diff --git a/analysis_options.yaml b/analysis_options.yaml
index d6dd068cd84..919d5d3c4ce 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -164,9 +164,10 @@ dart_code_metrics:
       # TODO(https://github.com/flutter/devtools/issues/9906) remove these
       # excludes as findings are resolved.
       - integration_test/**
+      # Investigate internal usages of inspector_controller before removing.
+      - lib/src/screens/inspector/**_controller.dart
       - lib/src/extensions/**
       - lib/src/framework/**
-      - lib/src/screens/**
       - lib/src/service/**
       - lib/src/shared/**
       - lib/src/standalone_ui/**
diff --git a/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart b/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
index 388fe7ab9d8..bdcc3f16bf0 100644
--- a/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
+++ b/packages/devtools_app/lib/src/extensions/embedded/_controller_web.dart
@@ -78,6 +78,7 @@ class EmbeddedExtensionControllerImpl extends EmbeddedExtensionController
   final extensionPostEventStream =
       StreamController<DevToolsExtensionEvent>.broadcast();
 
+    // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9907): false positive.
   bool _initialized = false;
 
   @override
diff --git a/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart b/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
index 5d9403f6ce8..051461bbbe0 100644
--- a/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
+++ b/packages/devtools_app/lib/src/extensions/embedded/_view_desktop.dart
@@ -7,9 +7,10 @@ import 'package:flutter/material.dart';
 import 'controller.dart';
 
 class EmbeddedExtension extends StatelessWidget {
-  const EmbeddedExtension({super.key, required this.controller});
-
-  final EmbeddedExtensionController controller;
+  const EmbeddedExtension({
+    super.key,
+    required EmbeddedExtensionController controller,
+  });
 
   @override
   Widget build(BuildContext context) {
diff --git a/packages/devtools_app/lib/src/extensions/extension_service.dart b/packages/devtools_app/lib/src/extensions/extension_service.dart
index 2c7513b48ca..ae49a3b7022 100644
--- a/packages/devtools_app/lib/src/extensions/extension_service.dart
+++ b/packages/devtools_app/lib/src/extensions/extension_service.dart
@@ -70,6 +70,7 @@ class ExtensionService extends DisposableController
   ///
   /// This set of extensions will include one version of a DevTools extension
   /// per package.
+  @visibleForTesting
   List<DevToolsExtensionConfig> get availableExtensions =>
       _currentExtensions.value.availableExtensions;
 
diff --git a/packages/devtools_app/lib/src/framework/home_screen.dart b/packages/devtools_app/lib/src/framework/home_screen.dart
index 7b02646f24e..c3fceb32168 100644
--- a/packages/devtools_app/lib/src/framework/home_screen.dart
+++ b/packages/devtools_app/lib/src/framework/home_screen.dart
@@ -32,8 +32,6 @@ class HomeScreen extends Screen {
         titleGenerator: () => devToolsTitle.value,
       );
 
-  static final id = ScreenMetaData.home.id;
-
   final List<DevToolsJsonFile> sampleData;
 
   @override
@@ -165,10 +163,7 @@ class _ConnectInputState extends State<ConnectInput> with BlockingActionMixin {
   void initState() {
     super.initState();
     connectDialogController = TextEditingController();
-    assert(() {
-      _debugInitVmServiceCache();
-      return true;
-    }());
+    if (kDebugMode) _debugInitVmServiceCache();
   }
 
   void _debugInitVmServiceCache() async {
diff --git a/packages/devtools_app/lib/src/framework/release_notes.dart b/packages/devtools_app/lib/src/framework/release_notes.dart
index f6ea52ca9aa..f7632c6eaf0 100644
--- a/packages/devtools_app/lib/src/framework/release_notes.dart
+++ b/packages/devtools_app/lib/src/framework/release_notes.dart
@@ -28,6 +28,7 @@ bool debugTestReleaseNotes = false;
 // from the flutter/website PR, which has a GitHub action that automatically
 // stages commits to firebase. Example:
 // https://flutter-docs-prod--pr12652-devtools-release-notes-2-52-3bbb8c0u.web.app/tools/devtools/release-notes/release-notes-2.52.0.md.
+// ignore: unused-code, debug-only feature.
 String? _debugReleaseNotesUrl;
 
 const releaseNotesKey = Key('release_notes');
diff --git a/packages/devtools_app/lib/src/framework/scaffold/status_line.dart b/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
index 16133d36a29..54e78dc2954 100644
--- a/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
+++ b/packages/devtools_app/lib/src/framework/scaffold/status_line.dart
@@ -37,8 +37,6 @@ class StatusLine extends StatelessWidget {
   /// Whether to highlight the footer when DevTools is connected to an app.
   final bool highlightForConnection;
 
-  static const deviceInfoTooltip = 'Device Info';
-
   /// The padding around the footer in the DevTools UI.
   EdgeInsets get padding => const EdgeInsets.symmetric(
     horizontal: defaultSpacing,
diff --git a/packages/devtools_app/lib/src/screens/accessibility/accessibility_screen.dart b/packages/devtools_app/lib/src/screens/accessibility/accessibility_screen.dart
index fc387547b58..9fe59bacf4a 100644
--- a/packages/devtools_app/lib/src/screens/accessibility/accessibility_screen.dart
+++ b/packages/devtools_app/lib/src/screens/accessibility/accessibility_screen.dart
@@ -19,8 +19,6 @@ export 'semantics_tree_pane.dart';
 class AccessibilityScreen extends Screen {
   AccessibilityScreen() : super.fromMetaData(ScreenMetaData.accessibility);
 
-  static final id = ScreenMetaData.accessibility.id;
-
   @override
   Widget buildScreenBody(BuildContext context) =>
       const AccessibilityScreenBody();
@@ -36,11 +34,13 @@ class AccessibilityScreenBody extends StatefulWidget {
 
 class _AccessibilityScreenBodyState extends State<AccessibilityScreenBody>
     with AutoDisposeMixin {
+  // ignore: unused-code, temporarily ignore since this screen is under active development.   
   late AccessibilityController controller;
 
   @override
   void initState() {
     super.initState();
+    // ignore: unused-code, temporarily ignore since this screen is under active development.
     controller = screenControllers.lookup<AccessibilityController>();
   }
 
diff --git a/packages/devtools_app/lib/src/screens/app_size/app_size_screen.dart b/packages/devtools_app/lib/src/screens/app_size/app_size_screen.dart
index ff9deef67f9..d2cc641a2bb 100644
--- a/packages/devtools_app/lib/src/screens/app_size/app_size_screen.dart
+++ b/packages/devtools_app/lib/src/screens/app_size/app_size_screen.dart
@@ -212,7 +212,6 @@ class _AppSizeBodyState extends State<AppSizeBody>
                   if (currentTab.key == AppSizeScreen.diffTabKey) ...[
                     const SizedBox(width: defaultSpacing),
                     DiffTreeTypeDropdown(
-                      value: controller.activeDiffTreeType.value,
                       onChanged: (newDiffTreeType) {
                         controller.changeActiveDiffTreeType(newDiffTreeType!);
                       },
@@ -279,11 +278,9 @@ class AppUnitDropdown extends StatelessWidget {
 class DiffTreeTypeDropdown extends StatelessWidget {
   const DiffTreeTypeDropdown({
     super.key,
-    required this.value,
     required this.onChanged,
   });
 
-  final DiffTreeType value;
   final ValueChanged<DiffTreeType?>? onChanged;
 
   @override
diff --git a/packages/devtools_app/lib/src/screens/debugger/breakpoint_manager.dart b/packages/devtools_app/lib/src/screens/debugger/breakpoint_manager.dart
index 646fffa5d4b..b8207bc08d4 100644
--- a/packages/devtools_app/lib/src/screens/debugger/breakpoint_manager.dart
+++ b/packages/devtools_app/lib/src/screens/debugger/breakpoint_manager.dart
@@ -23,7 +23,6 @@ class BreakpointManager with DisposerMixin {
 
   final _breakPositionsMap = <String, List<SourcePosition>>{};
 
-  ValueListenable<List<Breakpoint>> get breakpoints => _breakpoints;
   final _breakpoints = ValueNotifier<List<Breakpoint>>([]);
 
   ValueListenable<List<BreakpointAndSourcePosition>>
diff --git a/packages/devtools_app/lib/src/screens/debugger/codeview_controller.dart b/packages/devtools_app/lib/src/screens/debugger/codeview_controller.dart
index befe39d175b..8f7abe4e6de 100644
--- a/packages/devtools_app/lib/src/screens/debugger/codeview_controller.dart
+++ b/packages/devtools_app/lib/src/screens/debugger/codeview_controller.dart
@@ -533,6 +533,7 @@ class CodeViewSourceLocationNavigationState extends DevToolsNavigationState {
     DevToolsNavigationState state,
   ) : super(kind: type, state: state.state);
 
+  @visibleForTesting
   static CodeViewSourceLocationNavigationState? fromState(
     DevToolsNavigationState? state,
   ) {
diff --git a/packages/devtools_app/lib/src/screens/debugger/span_parser.dart b/packages/devtools_app/lib/src/screens/debugger/span_parser.dart
index 69c96c48ffc..74cbe0137ad 100644
--- a/packages/devtools_app/lib/src/screens/debugger/span_parser.dart
+++ b/packages/devtools_app/lib/src/screens/debugger/span_parser.dart
@@ -589,19 +589,6 @@ class ScopeStack {
   /// Location where the next produced span should begin.
   ScopeStackLocation _nextLocation = ScopeStackLocation.zero;
 
-  /// Adds a scope for a given region.
-  ///
-  /// This method is the same as calling [push] and then [pop] with the same
-  /// args.
-  void add(
-    String? scope, {
-    required ScopeStackLocation start,
-    required ScopeStackLocation end,
-  }) {
-    push(scope, start);
-    pop(scope, end);
-  }
-
   /// Pushes a new scope onto the stack starting at [location].
   void push(String? scope, ScopeStackLocation location) {
     if (scope == null) return;
@@ -721,6 +708,8 @@ class ScopeStackItem {
   ScopeStackItem(this.scope, this.location);
 
   final String scope;
+
+  // ignore: unused-code, foundational to this data class.
   final ScopeStackLocation location;
 }
 
diff --git a/packages/devtools_app/lib/src/screens/debugger/syntax_highlighter.dart b/packages/devtools_app/lib/src/screens/debugger/syntax_highlighter.dart
index 4899a83f72f..82d2c785022 100644
--- a/packages/devtools_app/lib/src/screens/debugger/syntax_highlighter.dart
+++ b/packages/devtools_app/lib/src/screens/debugger/syntax_highlighter.dart
@@ -18,6 +18,7 @@ final _log = Logger('syntax_highlighter');
 class SyntaxHighlighter {
   SyntaxHighlighter({String? source}) : source = source ?? '';
 
+  @visibleForTesting
   SyntaxHighlighter.withGrammar({Grammar? grammar, String? source})
     : source = source ?? '' {
     _grammar = grammar;
diff --git a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
index 75a90841656..30ef0e59793 100644
--- a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
+++ b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
@@ -33,13 +33,12 @@ class DeepLinkListView extends StatefulWidget {
 }
 
 class _DeepLinkListViewState extends State<DeepLinkListView> {
-  late DeepLinksController controller;
-
   @override
   void initState() {
     super.initState();
-    controller = screenControllers.lookup<DeepLinksController>()
-      ..firstLoadWithDefaultConfigurations();
+    screenControllers
+        .lookup<DeepLinksController>()
+        .firstLoadWithDefaultConfigurations();
   }
 
   @override
diff --git a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_model.dart b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_model.dart
index feaed091a20..7d035f1b04e 100644
--- a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_model.dart
+++ b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_model.dart
@@ -219,14 +219,6 @@ class AASAfileFormatSubCheck extends CommonError {
     ),
   );
 
-  static final defaultsCaseSensitiveFormat = AASAfileFormatSubCheck(
-    'Applinks defaults case sensitive format',
-    propertyTypeMessage(
-      property: 'applinks.defaults.caseSensitive',
-      expectedType: 'boolean',
-    ),
-  );
-
   static const detailsFormat = AASAfileFormatSubCheck(
     'Applinks details format',
     'This test checks that the `applinks.details` property is formatted properly. Ref - '
@@ -402,6 +394,7 @@ class Path {
   final String path;
 
   // TODO(hangyujin): display queryParams in path table.
+  // ignore: unused-code, outstanding TODO.
   final Map<String, String> queryParams;
 
   /// A Boolean value that indicates whether to stop pattern matching and prevent the universal
diff --git a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_screen.dart b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_screen.dart
index 07520397476..a54110953f7 100644
--- a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_screen.dart
+++ b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_screen.dart
@@ -18,9 +18,8 @@ class DeepLinksScreen extends Screen {
 
   static final id = ScreenMetaData.deepLinks.id;
 
-  // TODO(https://github.com/flutter/devtools/issues/6013): write documentation.
-  // @override
-  // String get docPageId => id;
+  @override
+  String get docPageId => id;
 
   @override
   String get docsUrl => 'https://flutter.dev/to/deep-link-tool';
diff --git a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_services.dart b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_services.dart
index b260c74fe0c..e16accc0afb 100644
--- a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_services.dart
+++ b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_links_services.dart
@@ -109,6 +109,7 @@ final aasaFileFormatSubCheck = {
 
 class ValidateIosDomainResult {
   ValidateIosDomainResult(this.errorCode, this.domainErrors, this.paths);
+  // ignore: unused-code, this is addressed in a TODO below.
   final String errorCode;
   final Map<String, List<DomainError>> domainErrors;
   final Map<String, List<Path>> paths;
diff --git a/packages/devtools_app/lib/src/screens/dtd/dtd_tools_model.dart b/packages/devtools_app/lib/src/screens/dtd/dtd_tools_model.dart
index caeb1758ae8..a3303152419 100644
--- a/packages/devtools_app/lib/src/screens/dtd/dtd_tools_model.dart
+++ b/packages/devtools_app/lib/src/screens/dtd/dtd_tools_model.dart
@@ -21,12 +21,10 @@ class DtdServiceMethod implements Comparable<DtdServiceMethod> {
   const DtdServiceMethod({
     required this.service,
     required this.method,
-    this.capabilities,
   });
 
   final String? service;
   final String method;
-  final Map<String, Object?>? capabilities;
 
   String get displayName => [service, method].nonNulls.join('.');
 
diff --git a/packages/devtools_app/lib/src/screens/dtd/dtd_tools_screen.dart b/packages/devtools_app/lib/src/screens/dtd/dtd_tools_screen.dart
index 774871f46a7..46779d295af 100644
--- a/packages/devtools_app/lib/src/screens/dtd/dtd_tools_screen.dart
+++ b/packages/devtools_app/lib/src/screens/dtd/dtd_tools_screen.dart
@@ -27,8 +27,6 @@ import 'shared.dart';
 class DTDToolsScreen extends Screen {
   DTDToolsScreen() : super.fromMetaData(ScreenMetaData.dtdTools);
 
-  static final id = ScreenMetaData.dtdTools.id;
-
   @override
   Widget buildScreenBody(BuildContext _) => const DTDToolsScreenBody();
 }
diff --git a/packages/devtools_app/lib/src/screens/dtd/services.dart b/packages/devtools_app/lib/src/screens/dtd/services.dart
index a9dc28da97b..8a47a7a52cc 100644
--- a/packages/devtools_app/lib/src/screens/dtd/services.dart
+++ b/packages/devtools_app/lib/src/screens/dtd/services.dart
@@ -60,7 +60,6 @@ class ServicesController extends FeatureController {
           DtdServiceMethod(
             service: service.name,
             method: method.name,
-            capabilities: method.capabilities,
           ),
       ],
     ];
diff --git a/packages/devtools_app/lib/src/screens/inspector/inspector_screen.dart b/packages/devtools_app/lib/src/screens/inspector/inspector_screen.dart
index 6b8a1179b36..9db58faf8b8 100644
--- a/packages/devtools_app/lib/src/screens/inspector/inspector_screen.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/inspector_screen.dart
@@ -13,8 +13,6 @@ import 'inspector_screen_controller.dart';
 class InspectorScreen extends Screen {
   InspectorScreen() : super.fromMetaData(ScreenMetaData.inspector);
 
-  static const minScreenWidthForText = 900.0;
-
   static final id = ScreenMetaData.inspector.id;
 
   // There is not enough room to safely show the console in the embed view of
diff --git a/packages/devtools_app/lib/src/screens/inspector/inspector_screen_body.dart b/packages/devtools_app/lib/src/screens/inspector/inspector_screen_body.dart
index a112e94250a..f61c22f8106 100644
--- a/packages/devtools_app/lib/src/screens/inspector/inspector_screen_body.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/inspector_screen_body.dart
@@ -53,7 +53,6 @@ class InspectorScreenBodyState extends State<InspectorScreenBody>
   SearchTargetType searchTarget = SearchTargetType.widget;
 
   static const inspectorTreeKey = Key('Inspector Tree');
-  static const minScreenWidthForText = 900.0;
 
   @override
   void initState() {
diff --git a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/box/box.dart b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/box/box.dart
index bfd22ddd984..b11a6ff2aa7 100644
--- a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/box/box.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/box/box.dart
@@ -6,7 +6,6 @@ import 'package:flutter/material.dart';
 
 import '../../../../shared/diagnostics/diagnostics_node.dart';
 import '../../../../shared/primitives/utils.dart';
-import '../../inspector_controller.dart';
 import '../../inspector_data_models.dart';
 import '../ui/free_space.dart';
 import '../ui/theme.dart';
@@ -15,14 +14,12 @@ import '../ui/widget_constraints.dart';
 import '../ui/widgets_theme.dart';
 
 class BoxLayoutExplorerWidget extends StatelessWidget {
-  const BoxLayoutExplorerWidget(
-    this.inspectorController, {
+  const BoxLayoutExplorerWidget({
     super.key,
     required this.layoutProperties,
     required this.selectedNode,
   });
 
-  final InspectorController inspectorController;
   final LayoutProperties? layoutProperties;
   final RemoteDiagnosticsNode? selectedNode;
 
@@ -230,56 +227,6 @@ class BoxLayoutExplorerWidget extends StatelessWidget {
 String _describeBoxName(LayoutProperties properties) =>
     properties.node.description ?? '';
 
-/// Represents a box widget and its surrounding padding.
-class BoxChildAndPaddingVisualizer extends StatelessWidget {
-  const BoxChildAndPaddingVisualizer({
-    super.key,
-    required this.layoutProperties,
-    required this.renderProperties,
-    required this.isSelected,
-  });
-
-  final bool isSelected;
-  final LayoutProperties layoutProperties;
-  final RenderProperties renderProperties;
-
-  LayoutProperties? get properties => renderProperties.layoutProperties;
-
-  @override
-  Widget build(BuildContext context) {
-    final renderSize = renderProperties.size;
-    final renderOffset = renderProperties.offset;
-
-    final propertiesLocal = properties!;
-
-    return Positioned(
-      top: renderOffset.dy,
-      left: renderOffset.dx,
-      child: SizedBox(
-        width: safePositiveDouble(renderSize.width),
-        height: safePositiveDouble(renderSize.height),
-        child: WidgetVisualizer(
-          isSelected: isSelected,
-          layoutProperties: layoutProperties,
-          title: _describeBoxName(propertiesLocal),
-          // TODO(jacobr): consider surfacing the overflow size information
-          // if we determine
-          // overflowSide: properties.overflowSide,
-
-          // We only show one child at a time so a large title is safe.
-          largeTitle: true,
-          child: VisualizeWidthAndHeightWithConstraints(
-            arrowHeadSize: arrowHeadSize,
-            properties: propertiesLocal,
-            warnIfUnconstrained: false,
-            child: const SizedBox.shrink(),
-          ),
-        ),
-      ),
-    );
-  }
-}
-
 /// Widget that represents and visualize a direct child of Flex widget.
 class BoxChildVisualizer extends StatelessWidget {
   const BoxChildVisualizer({
diff --git a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/theme.dart b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/theme.dart
index 666a6d902ca..4a1b947a931 100644
--- a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/theme.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/theme.dart
@@ -68,11 +68,6 @@ const overflowBackgroundColorLight = Color(0xFFB00020);
 const overflowTextColorDark = Color(0xfff5846b);
 const overflowTextColorLight = Color(0xffdea089);
 
-const backgroundColorSelectedDark = Color(
-  0x4d474747,
-); // TODO(jacobr): we would like Color(0x4dedeeef) but that makes the background show through.
-const backgroundColorSelectedLight = Color(0x4dedeeef);
-
 extension LayoutExplorerColorScheme on ColorScheme {
   Color get mainAxisColor => isLight ? mainAxisLightColor : mainAxisDarkColor;
 
@@ -93,16 +88,10 @@ extension LayoutExplorerColorScheme on ColorScheme {
   Color get overflowTextColor =>
       isLight ? overflowTextColorLight : overflowTextColorDark;
 
-  Color get backgroundColorSelected =>
-      isLight ? backgroundColorSelectedLight : backgroundColorSelectedDark;
-
   Color get unconstrainedColor =>
       isLight ? unconstrainedLightColor : unconstrainedDarkColor;
 }
 
-const backgroundColorDark = Color(0xff30302f);
-const backgroundColorLight = Color(0xffffffff);
-
 const unconstrainedDarkColor = Color(0xffdea089);
 const unconstrainedLightColor = Color(0xfff5846b);
 
diff --git a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/widgets_theme.dart b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/widgets_theme.dart
index a492a1cddbb..c0a76886c8a 100644
--- a/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/widgets_theme.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/layout_explorer/ui/widgets_theme.dart
@@ -198,7 +198,6 @@ class WidgetTheme {
 class WidgetIcons {
   static const root = 'icons/inspector/widget_icons/root.png';
   static const text = 'icons/inspector/widget_icons/text.png';
-  static const icon = 'icons/inspector/widget_icons/icon.png';
   static const image = 'icons/inspector/widget_icons/image.png';
   static const floatingActionButton =
       'icons/inspector/widget_icons/floatingab.png';
diff --git a/packages/devtools_app/lib/src/screens/inspector/widget_details.dart b/packages/devtools_app/lib/src/screens/inspector/widget_details.dart
index 7f12ed522c0..369c657ce73 100644
--- a/packages/devtools_app/lib/src/screens/inspector/widget_details.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/widget_details.dart
@@ -50,7 +50,7 @@ class _WidgetDetailsState extends State<WidgetDetails> with AutoDisposeMixin {
           );
         }
 
-        return DetailsTable(controller: controller, node: node);
+        return DetailsTable(controller: controller);
       },
     );
   }
diff --git a/packages/devtools_app/lib/src/screens/inspector/widget_properties/properties_view.dart b/packages/devtools_app/lib/src/screens/inspector/widget_properties/properties_view.dart
index 1822d718819..e33624c42e0 100644
--- a/packages/devtools_app/lib/src/screens/inspector/widget_properties/properties_view.dart
+++ b/packages/devtools_app/lib/src/screens/inspector/widget_properties/properties_view.dart
@@ -23,15 +23,11 @@ class DetailsTable extends StatefulWidget {
   const DetailsTable({
     super.key,
     required this.controller,
-    required this.node,
-    this.extraTabs,
   });
 
   static const gaPrefix = 'inspectorDetailsTable';
 
   final InspectorController controller;
-  final RemoteDiagnosticsNode node;
-  final List<TabAndView>? extraTabs;
 
   @override
   State<DetailsTable> createState() => _DetailsTableState();
@@ -44,9 +40,6 @@ class _DetailsTableState extends State<DetailsTable> {
   RemoteDiagnosticsNode? get selectedNode =>
       widget.controller.selectedDiagnostic;
 
-  LayoutProperties? get layoutProperties =>
-      widget.controller.selectedNodeProperties.value.layoutProperties;
-
   final _widgetPropertiesTab = DevToolsTab.create(
     tabName: 'Widget properties',
     gaPrefix: DetailsTable.gaPrefix,
@@ -269,7 +262,6 @@ class _PropertiesViewState extends State<PropertiesView> {
                           height: PropertiesView.layoutExplorerHeight,
                           width: PropertiesView.layoutExplorerWidth,
                           child: BoxLayoutExplorerWidget(
-                            widget.controller,
                             selectedNode: selectedNode,
                             layoutProperties: widget.layoutProperties,
                           ),
diff --git a/packages/devtools_app/lib/src/screens/logging/_logs_table.dart b/packages/devtools_app/lib/src/screens/logging/_logs_table.dart
index c406a428d45..2643f2f06a6 100644
--- a/packages/devtools_app/lib/src/screens/logging/_logs_table.dart
+++ b/packages/devtools_app/lib/src/screens/logging/_logs_table.dart
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 import '../../shared/primitives/utils.dart';
@@ -17,8 +16,6 @@ class LogsTable extends StatelessWidget {
     required this.controller,
     required this.data,
     required this.selectionNotifier,
-    required this.searchMatchesNotifier,
-    required this.activeSearchMatchNotifier,
   });
 
   static const _logRowHeight = 45.0;
@@ -26,8 +23,6 @@ class LogsTable extends StatelessWidget {
   final LoggingController controller;
   final List<LogData> data;
   final ValueNotifier<LogData?> selectionNotifier;
-  final ValueListenable<List<LogData>> searchMatchesNotifier;
-  final ValueListenable<LogData?> activeSearchMatchNotifier;
 
   static const whenColumn = WhenColumn();
   static const messageColumn = MessageColumn();
diff --git a/packages/devtools_app/lib/src/screens/logging/logging_controller.dart b/packages/devtools_app/lib/src/screens/logging/logging_controller.dart
index da6f1cedf8f..85cfe71e4b4 100644
--- a/packages/devtools_app/lib/src/screens/logging/logging_controller.dart
+++ b/packages/devtools_app/lib/src/screens/logging/logging_controller.dart
@@ -27,7 +27,6 @@ import '../../shared/primitives/message_bus.dart';
 import '../../shared/primitives/utils.dart';
 import '../../shared/ui/filter.dart';
 import '../../shared/ui/search.dart';
-import '../inspector/inspector_tree_controller.dart';
 import 'log_details_controller.dart';
 import 'logging_screen.dart';
 import 'metadata.dart';
@@ -40,12 +39,6 @@ final dateTimeFormat = DateFormat('HH:mm:ss.SSS (MM/dd/yy)');
 
 bool _verboseDebugging = false;
 
-typedef OnShowDetails =
-    void Function({String? text, InspectorTreeController? tree});
-
-typedef CreateLoggingTree =
-    InspectorTreeController Function({VoidCallback? onSelectionChange});
-
 typedef ZoneDescription = ({String? name, int? identityHashCode});
 
 Future<String> _retrieveFullStringValue(
@@ -820,8 +813,6 @@ class LoggingController extends DevToolsScreenController
 }
 
 extension type _LogRecord(Map<String, dynamic> json) {
-  int? get sequenceNumber => json['sequenceNumber'];
-
   int? get level => json['level'];
 
   Map<String, Object?> get loggerName => json['loggerName'];
@@ -934,12 +925,6 @@ class StdoutEventHandler {
       }
     });
   }
-
-  @visibleForTesting
-  LogData? get buffer => _buffer;
-
-  @visibleForTesting
-  Timer? get timer => _timer;
 }
 
 bool _isNotNull(InstanceRef? serviceRef) {
@@ -977,7 +962,6 @@ class LogData with SearchableDataMixin {
     int? level,
     this.isError = false,
     this.detailsComputer,
-    this.node,
     this.isolateRef,
     this.zone,
   }) : level = level ?? (isError ? Level.SEVERE.value : Level.INFO.value) {
@@ -1008,7 +992,6 @@ class LogData with SearchableDataMixin {
       _levelName ??= LogLevelMetadataChip.generateLogLevel(level).name;
   String? _levelName;
 
-  final RemoteDiagnosticsNode? node;
   String? _details;
   Future<String> Function()? detailsComputer;
 
diff --git a/packages/devtools_app/lib/src/screens/logging/logging_screen.dart b/packages/devtools_app/lib/src/screens/logging/logging_screen.dart
index 79d2c7cfbe2..87adecacab6 100644
--- a/packages/devtools_app/lib/src/screens/logging/logging_screen.dart
+++ b/packages/devtools_app/lib/src/screens/logging/logging_screen.dart
@@ -80,8 +80,6 @@ class _LoggingScreenState extends State<LoggingScreenBody>
                   controller: controller,
                   data: controller.filteredData.value,
                   selectionNotifier: controller.selectedLog,
-                  searchMatchesNotifier: controller.searchMatches,
-                  activeSearchMatchNotifier: controller.activeSearchMatch,
                 ),
               ),
               ValueListenableBuilder<LogData?>(
diff --git a/packages/devtools_app/lib/src/screens/memory/panes/chart/data/charts.dart b/packages/devtools_app/lib/src/screens/memory/panes/chart/data/charts.dart
index 35d74718e76..08273b61b4b 100644
--- a/packages/devtools_app/lib/src/screens/memory/panes/chart/data/charts.dart
+++ b/packages/devtools_app/lib/src/screens/memory/panes/chart/data/charts.dart
@@ -9,7 +9,6 @@ import 'package:flutter/material.dart';
 
 import '../../../../../shared/charts/chart_trace.dart';
 import '../../../../../shared/primitives/byte_utils.dart';
-import '../../../../../shared/primitives/utils.dart';
 import '../../../shared/primitives/memory_timeline.dart';
 
 /// Name of each trace being charted, index order is the trace index
@@ -48,13 +47,6 @@ const customEvent = 'custom';
 const customEventName = 'name';
 const customEventData = 'data';
 
-const indexPayloadJson = 'index';
-const timestampPayloadJson = 'timestamp';
-const prettyTimestampPayloadJson = 'prettyTimestamp';
-const eventPayloadJson = 'event';
-const vmPayloadJson = 'vm';
-const androidPayloadJson = 'android';
-
 /// VM Data
 const rssJsonName = 'rss';
 const capacityJsonName = 'capacity';
@@ -156,17 +148,6 @@ class ChartsValues {
 
   final _android = <String, Object>{};
 
-  Map<String, Object?> toJson() {
-    return {
-      indexPayloadJson: index,
-      timestampPayloadJson: timestamp,
-      prettyTimestampPayloadJson: prettyTimestamp(timestamp),
-      eventPayloadJson: _event,
-      vmPayloadJson: _vm,
-      androidPayloadJson: _android,
-    };
-  }
-
   int get eventCount =>
       _event.entries.length -
       (extensionEventsLength > 0 ? 1 : 0) +
diff --git a/packages/devtools_app/lib/src/screens/memory/panes/diff/widgets/instances.dart b/packages/devtools_app/lib/src/screens/memory/panes/diff/widgets/instances.dart
index 38a1af79c46..eb2b1b61774 100644
--- a/packages/devtools_app/lib/src/screens/memory/panes/diff/widgets/instances.dart
+++ b/packages/devtools_app/lib/src/screens/memory/panes/diff/widgets/instances.dart
@@ -66,8 +66,7 @@ class _StoreAllAsVariableMenu extends StatelessWidget {
 
   final SnapshotClassSampler sampler;
 
-  // TODO(https://github.com/flutter/devtools/issues/7905): this is a bug that
-  // this is unused.
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/7905) this is a bug that this is unused.
   final bool liveItemsEnabled;
 
   @override
diff --git a/packages/devtools_app/lib/src/screens/memory/panes/profile/instances.dart b/packages/devtools_app/lib/src/screens/memory/panes/profile/instances.dart
index 4c11d85e80b..9aa189480b3 100644
--- a/packages/devtools_app/lib/src/screens/memory/panes/profile/instances.dart
+++ b/packages/devtools_app/lib/src/screens/memory/panes/profile/instances.dart
@@ -25,8 +25,7 @@ class ProfileInstanceTableCell extends StatelessWidget {
     required this.count,
   }) : _shouldShowMenu = isSelected && count > 0;
 
-  // TODO(https://github.com/flutter/devtools/issues/7905): this is a bug that
-  // this is unused.
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/7905): this is a bug that this is unused.
   final MemoryAreas gaContext;
   final int count;
   final bool _shouldShowMenu;
diff --git a/packages/devtools_app/lib/src/screens/memory/panes/tracing/tracing_pane_controller.dart b/packages/devtools_app/lib/src/screens/memory/panes/tracing/tracing_pane_controller.dart
index 675da928e4f..93f3fa3ec37 100644
--- a/packages/devtools_app/lib/src/screens/memory/panes/tracing/tracing_pane_controller.dart
+++ b/packages/devtools_app/lib/src/screens/memory/panes/tracing/tracing_pane_controller.dart
@@ -68,6 +68,7 @@ class TracePaneController extends DisposableController
   );
 
   /// A Future tracking whether the controller has been initialized.
+  @visibleForTesting
   Future<void> get initialized => _initialized.future;
   final _initialized = Completer<void>();
 
diff --git a/packages/devtools_app/lib/src/screens/memory/shared/primitives/memory_timeline.dart b/packages/devtools_app/lib/src/screens/memory/shared/primitives/memory_timeline.dart
index 8300073fd8f..45925c1f838 100644
--- a/packages/devtools_app/lib/src/screens/memory/shared/primitives/memory_timeline.dart
+++ b/packages/devtools_app/lib/src/screens/memory/shared/primitives/memory_timeline.dart
@@ -30,8 +30,6 @@ class MemoryTimeline extends Disposable with Serializable {
 
   static const _jsonData = 'data';
 
-  int get endingIndex => data.isNotEmpty ? data.length - 1 : -1;
-
   /// Raw Heap sampling data from the VM.
   late final List<HeapSample> data;
 
diff --git a/packages/devtools_app/lib/src/screens/network/constants.dart b/packages/devtools_app/lib/src/screens/network/constants.dart
index e8fa703e4be..be66652e00d 100644
--- a/packages/devtools_app/lib/src/screens/network/constants.dart
+++ b/packages/devtools_app/lib/src/screens/network/constants.dart
@@ -7,15 +7,8 @@ enum NetworkEventKeys {
   version,
   creator,
   name,
-  pages,
   startedDateTime,
-  id,
-  title,
-  pageTimings,
-  onContentLoad,
-  onLoad,
   entries,
-  pageref,
   time,
   request,
   method,
@@ -44,7 +37,6 @@ enum NetworkEventKeys {
   wait,
   receive,
   ssl,
-  serverIPAddress,
   connection,
   comment,
   value,
@@ -62,8 +54,6 @@ enum NetworkEventKeys {
 class NetworkEventDefaults {
   static const logVersion = '1.2';
   static const creatorName = 'devtools';
-  static const onContentLoad = -1;
-  static const onLoad = -1;
   static const httpVersion = 'HTTP/1.1';
   static const responseHttpVersion = 'http/2.0';
   static const blocked = -1;
diff --git a/packages/devtools_app/lib/src/screens/network/har_network_data.dart b/packages/devtools_app/lib/src/screens/network/har_network_data.dart
index 7895e008e04..f8519bcf91b 100644
--- a/packages/devtools_app/lib/src/screens/network/har_network_data.dart
+++ b/packages/devtools_app/lib/src/screens/network/har_network_data.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
 import 'package:devtools_shared/devtools_shared.dart';
+import 'package:meta/meta.dart';
 import '../../shared/http/http_request_data.dart';
 import 'constants.dart';
 import 'har_builder.dart';
@@ -28,6 +29,7 @@ class HarNetworkData with Serializable {
   /// ```dart
   /// final harData = HarNetworkData.fromJson(json);
   /// ```
+  @visibleForTesting
   factory HarNetworkData.fromJson(Map<String, Object?> json) {
     final entries =
         ((json[NetworkEventKeys.log.name]
diff --git a/packages/devtools_app/lib/src/screens/network/network_model.dart b/packages/devtools_app/lib/src/screens/network/network_model.dart
index 9ccc3c5217a..3d7fa035607 100644
--- a/packages/devtools_app/lib/src/screens/network/network_model.dart
+++ b/packages/devtools_app/lib/src/screens/network/network_model.dart
@@ -192,8 +192,6 @@ class Socket extends NetworkRequest {
   @override
   int get hashCode => id.hashCode;
 
-  SocketStatistic get socketData => _socket;
-
   @override
   Map<String, Object?> toJson() {
     return {
diff --git a/packages/devtools_app/lib/src/screens/network/network_screen.dart b/packages/devtools_app/lib/src/screens/network/network_screen.dart
index 81202fb34e6..8230e002baa 100644
--- a/packages/devtools_app/lib/src/screens/network/network_screen.dart
+++ b/packages/devtools_app/lib/src/screens/network/network_screen.dart
@@ -6,7 +6,6 @@ import 'dart:async';
 
 import 'package:devtools_app_shared/ui.dart';
 import 'package:devtools_app_shared/utils.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
@@ -321,9 +320,7 @@ class _NetworkProfilerBody extends StatelessWidget {
           valueListenable: controller.filteredData,
           builder: (context, filteredRequests, _) {
             return NetworkRequestsTable(
-              requests: filteredRequests,
-              searchMatchesNotifier: controller.searchMatches,
-              activeSearchMatchNotifier: controller.activeSearchMatch,
+              requests: filteredRequests
             );
           },
         ),
@@ -337,8 +334,6 @@ class NetworkRequestsTable extends StatelessWidget {
   const NetworkRequestsTable({
     super.key,
     required this.requests,
-    required this.searchMatchesNotifier,
-    required this.activeSearchMatchNotifier,
   });
 
   static const methodColumn = MethodColumn();
@@ -361,8 +356,6 @@ class NetworkRequestsTable extends StatelessWidget {
   ];
 
   final List<NetworkRequest> requests;
-  final ValueListenable<List<NetworkRequest>> searchMatchesNotifier;
-  final ValueListenable<NetworkRequest?> activeSearchMatchNotifier;
 
   @override
   Widget build(BuildContext context) {
diff --git a/packages/devtools_app/lib/src/screens/network/offline_network_data.dart b/packages/devtools_app/lib/src/screens/network/offline_network_data.dart
index ce6855ac382..2a7cc91aa57 100644
--- a/packages/devtools_app/lib/src/screens/network/offline_network_data.dart
+++ b/packages/devtools_app/lib/src/screens/network/offline_network_data.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
 import 'package:devtools_shared/devtools_shared.dart';
+import 'package:meta/meta.dart';
 
 import '../../shared/http/http_request_data.dart';
 import '../network/network_controller.dart';
@@ -65,6 +66,7 @@ class OfflineNetworkData with Serializable {
     );
   }
 
+  @visibleForTesting
   bool get isEmpty => httpRequestData.isEmpty && socketData.isEmpty;
 
   /// List of current [DartIOHttpRequestData] network requests.
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frame_model.dart b/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frame_model.dart
index 9b199dbea87..04b4cf790a5 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frame_model.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frame_model.dart
@@ -165,10 +165,6 @@ class FlutterFrame {
     timelineEventData.rasterEvent?.writeTrackEventsToBuffer(buf);
     return buf.toString();
   }
-
-  FlutterFrame shallowCopy() {
-    return FlutterFrame.fromJson(json);
-  }
 }
 
 class FrameTimelineEventData {
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_controller.dart b/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_controller.dart
index ff970282c2c..309b5c7b4a4 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_controller.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_controller.dart
@@ -61,11 +61,6 @@ class FlutterFramesController extends PerformanceFeatureController {
   /// frame id in the corresponding [FlutterTimelineEvent]s.
   final _unassignedFlutterFrames = <int, FlutterFrame>{};
 
-  /// Tracks the current frame undergoing selection so that we can equality
-  /// check after async operations and bail out early if another frame has been
-  /// selected during awaits.
-  FlutterFrame? currentFrameBeingSelected;
-
   @override
   Future<void> init() async {
     if (!offlineDataController.showingOfflineData.value) {
@@ -184,8 +179,6 @@ class FlutterFramesController extends PerformanceFeatureController {
 
   @override
   void handleSelectedFrame(FlutterFrame frame) {
-    currentFrameBeingSelected = frame;
-
     // Unselect [frame] if is already selected.
     if (_selectedFrameNotifier.value == frame) {
       _selectedFrameNotifier.value = null;
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis_model.dart b/packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis_model.dart
index 0e82e25d060..b2495ef211d 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis_model.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis_model.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
+import 'package:meta/meta.dart';
+
 import '../../../../shared/primitives/trees.dart';
 import '../../../../shared/primitives/utils.dart';
 import '../../performance_model.dart';
@@ -128,6 +130,7 @@ class FrameAnalysis {
     return longest;
   }
 
+  @visibleForTesting
   bool get hasExpensiveOperations =>
       saveLayerCount + intrinsicOperationsCount > 0;
 
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_model.dart b/packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_model.dart
index 153778fa520..91c1d0a63c4 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_model.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_model.dart
@@ -211,8 +211,6 @@ class RebuildCountModel {
     return _rebuildsForFrame[frameNumber];
   }
 
-  bool get isNotEmpty => _rebuildsForFrame.isNotEmpty;
-
   Map<String, Object?>? toJson() {
     if (_rebuildsForFrame.isEmpty) {
       // No need to encode data unless there were actually rebuilds reported.
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_web.dart b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_web.dart
index c032ba10887..e284d9d2ebf 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_web.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_web.dart
@@ -159,6 +159,7 @@ class PerfettoControllerImpl extends PerfettoController {
 
   final perfettoPostEventStream = StreamController<String>.broadcast();
 
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9907) false positive.
   bool _initialized = false;
 
   @override
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_desktop.dart b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_desktop.dart
index 1315d9589b2..7f0881ab4b4 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_desktop.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_desktop.dart
@@ -7,9 +7,7 @@ import 'package:flutter/material.dart';
 import 'perfetto_controller.dart';
 
 class Perfetto extends StatelessWidget {
-  const Perfetto({super.key, required this.perfettoController});
-
-  final PerfettoController perfettoController;
+  const Perfetto({super.key, required PerfettoController perfettoController});
 
   @override
   Widget build(BuildContext context) {
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/tracing/model.dart b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/tracing/model.dart
index c2ec2f4d12b..e3ddac11beb 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/tracing/model.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/tracing/model.dart
@@ -101,6 +101,7 @@ class PerfettoTrackEvent extends _PerfettoTracePacket
     ].nonNulls,
   );
 
+  @visibleForTesting
   List<String> get categories => event.categories;
 
   /// The id of the Perfetto track that this event is included in.
diff --git a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart
index 53830788d5d..c37291140d6 100644
--- a/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart
+++ b/packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart
@@ -49,7 +49,6 @@ class TimelineEventsController extends PerformanceFeatureController
 
   static const uiThreadSuffix = '.ui';
   static const rasterThreadSuffix = '.raster';
-  static const gpuThreadSuffix = '.gpu';
   static const platformThreadSuffix = '.platform';
   static const flutterTestThreadSuffix = '.flutter.test..ui';
   static final _refreshWorkTrackerDelay = const Duration(
diff --git a/packages/devtools_app/lib/src/screens/performance/performance_model.dart b/packages/devtools_app/lib/src/screens/performance/performance_model.dart
index a965879822c..89c310747ff 100644
--- a/packages/devtools_app/lib/src/screens/performance/performance_model.dart
+++ b/packages/devtools_app/lib/src/screens/performance/performance_model.dart
@@ -163,16 +163,6 @@ class FlutterTimelineEvent extends TreeNode<FlutterTimelineEvent> {
     timeBuilder: _timeBuilder.copy(),
   );
 
-  @visibleForTesting
-  FlutterTimelineEvent deepCopy() {
-    final copy = shallowCopy();
-    copy.parent = parent;
-    for (final child in children) {
-      copy.addChild(child.deepCopy());
-    }
-    return copy;
-  }
-
   @override
   String toString() {
     final buf = StringBuffer();
diff --git a/packages/devtools_app/lib/src/screens/profiler/cpu_profile_model.dart b/packages/devtools_app/lib/src/screens/profiler/cpu_profile_model.dart
index f1eb442f8e4..82b0f1fc975 100644
--- a/packages/devtools_app/lib/src/screens/profiler/cpu_profile_model.dart
+++ b/packages/devtools_app/lib/src/screens/profiler/cpu_profile_model.dart
@@ -577,7 +577,6 @@ class CpuProfileData with Serializable {
     final stackFrames =
         await _CpuStackFrameGenerator(
           isolateId: isolateId,
-          cpuSamples: cpuSamples,
           profileMetaData: profileMetaData,
         ).generate(
           treeRoot: _CpuProfileTimelineTree.fromCpuSamples(
@@ -1175,11 +1174,6 @@ class CpuProfileStore {
     _profilesByTime.clear();
     _profilesByLabel.clear();
   }
-
-  void debugPrintKeys() {
-    _log.info('_profilesByLabel: ${_profilesByLabel.keys}');
-    _log.info('_profilesByTime: ${_profilesByTime.keys}');
-  }
 }
 
 class _CpuProfileTimelineTree {
@@ -1329,7 +1323,7 @@ class _CpuProfileTimelineTree {
 }
 
 /// A generator class for creating a set of [CpuStackFrame]s from a
-/// [vm_service.CpuSamples] object.
+/// [_CpuProfileTimelineTree] object.
 ///
 /// This class is responsible for traversing the call stacks of a CPU profile,
 /// creating a [CpuStackFrame] for each unique frame, and assigning a unique
@@ -1339,12 +1333,10 @@ class _CpuProfileTimelineTree {
 class _CpuStackFrameGenerator {
   _CpuStackFrameGenerator({
     required this.isolateId,
-    required this.cpuSamples,
     required this.profileMetaData,
   });
 
   final String isolateId;
-  final vm_service.CpuSamples cpuSamples;
   final CpuProfileMetaData profileMetaData;
 
   final _stackFrames = <String, CpuStackFrame>{};
diff --git a/packages/devtools_app/lib/src/screens/profiler/cpu_profiler_controller.dart b/packages/devtools_app/lib/src/screens/profiler/cpu_profiler_controller.dart
index 4caea9b1072..4274eb2422f 100644
--- a/packages/devtools_app/lib/src/screens/profiler/cpu_profiler_controller.dart
+++ b/packages/devtools_app/lib/src/screens/profiler/cpu_profiler_controller.dart
@@ -411,6 +411,7 @@ class CpuProfilerController extends DisposableController
     return '$label${filterTag.isNotEmpty ? '-$filterTag' : ''}';
   }
 
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9910) seems like a bug.
   Future<void> loadAppStartUpProfile() async {
     Future<void> loadAppStartUpProfileHelper() async {
       // Look up the stored app start up profiles before calling [reset]. This
diff --git a/packages/devtools_app/lib/src/screens/profiler/panes/controls/profiler_screen_controls.dart b/packages/devtools_app/lib/src/screens/profiler/panes/controls/profiler_screen_controls.dart
index fbc7cb06d38..c1c5b244514 100644
--- a/packages/devtools_app/lib/src/screens/profiler/panes/controls/profiler_screen_controls.dart
+++ b/packages/devtools_app/lib/src/screens/profiler/panes/controls/profiler_screen_controls.dart
@@ -18,7 +18,6 @@ class ProfilerScreenControls extends StatelessWidget {
     required this.controller,
     required this.recording,
     required this.processing,
-    required this.offline,
   });
 
   final ProfilerScreenController controller;
@@ -27,8 +26,6 @@ class ProfilerScreenControls extends StatelessWidget {
 
   final bool processing;
 
-  final bool offline;
-
   @override
   Widget build(BuildContext context) {
     return OfflineAwareControls(
diff --git a/packages/devtools_app/lib/src/screens/profiler/panes/method_table/method_table_model.dart b/packages/devtools_app/lib/src/screens/profiler/panes/method_table/method_table_model.dart
index d7e78bed259..93b7cc9c236 100644
--- a/packages/devtools_app/lib/src/screens/profiler/panes/method_table/method_table_model.dart
+++ b/packages/devtools_app/lib/src/screens/profiler/panes/method_table/method_table_model.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
 import 'package:collection/collection.dart';
+import 'package:meta/meta.dart';
 
 import '../../../../shared/primitives/graph.dart';
 import '../../../../shared/primitives/utils.dart';
@@ -136,6 +137,7 @@ $display ($totalCount samples)
 ''';
   }
 
+  @visibleForTesting
   MethodTableGraphNode copy() {
     return MethodTableGraphNode(
       name: name,
diff --git a/packages/devtools_app/lib/src/screens/profiler/profiler_screen.dart b/packages/devtools_app/lib/src/screens/profiler/profiler_screen.dart
index cf473f55f24..ae60c9aa1c8 100644
--- a/packages/devtools_app/lib/src/screens/profiler/profiler_screen.dart
+++ b/packages/devtools_app/lib/src/screens/profiler/profiler_screen.dart
@@ -142,7 +142,6 @@ class _ProfilerScreenBodyState extends State<ProfilerScreenBody>
               controller: controller,
               recording: recording,
               processing: profilerBusy,
-              offline: offlineDataController.showingOfflineData.value,
             ),
             const SizedBox(height: intermediateSpacing),
             Expanded(
diff --git a/packages/devtools_app/lib/src/screens/provider/provider_screen.dart b/packages/devtools_app/lib/src/screens/provider/provider_screen.dart
index e4f077ad8f2..027ee4eda19 100644
--- a/packages/devtools_app/lib/src/screens/provider/provider_screen.dart
+++ b/packages/devtools_app/lib/src/screens/provider/provider_screen.dart
@@ -11,8 +11,6 @@ import '../../shared/ui/common_widgets.dart';
 class ProviderScreen extends Screen {
   ProviderScreen() : super.fromMetaData(ScreenMetaData.provider);
 
-  static final id = ScreenMetaData.provider.id;
-
   @override
   Widget buildScreenBody(BuildContext context) {
     return CenteredMessage(
diff --git a/packages/devtools_app/lib/src/screens/vm_developer/object_inspector/inbound_references_tree.dart b/packages/devtools_app/lib/src/screens/vm_developer/object_inspector/inbound_references_tree.dart
index c48c3c32a83..56d31243d55 100644
--- a/packages/devtools_app/lib/src/screens/vm_developer/object_inspector/inbound_references_tree.dart
+++ b/packages/devtools_app/lib/src/screens/vm_developer/object_inspector/inbound_references_tree.dart
@@ -26,6 +26,7 @@ class InboundReferencesTreeNode extends TreeNode<InboundReferencesTreeNode> {
   @override
   bool get isExpandable => ref.source != null;
 
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9910) this seems like a bug.
   late final description = _inboundRefDescription(ref, null);
 
   /// Wrapper to get the name of an [ObjRef] depending on its type.
diff --git a/packages/devtools_app/lib/src/screens/vm_developer/vm_developer_tools_screen.dart b/packages/devtools_app/lib/src/screens/vm_developer/vm_developer_tools_screen.dart
index e30f8cdae62..e544efde766 100644
--- a/packages/devtools_app/lib/src/screens/vm_developer/vm_developer_tools_screen.dart
+++ b/packages/devtools_app/lib/src/screens/vm_developer/vm_developer_tools_screen.dart
@@ -37,8 +37,6 @@ abstract class VMDeveloperView {
 class VMDeveloperToolsScreen extends Screen {
   VMDeveloperToolsScreen() : super.fromMetaData(ScreenMetaData.vmTools);
 
-  static final id = ScreenMetaData.vmTools.id;
-
   @override
   ValueListenable<bool> get showIsolateSelector =>
       VMDeveloperToolsController.showIsolateSelector;
diff --git a/packages/devtools_app/lib/src/screens/vm_developer/vm_service_private_extensions.dart b/packages/devtools_app/lib/src/screens/vm_developer/vm_service_private_extensions.dart
index 7b8c3c4d9fb..9a77b16fd30 100644
--- a/packages/devtools_app/lib/src/screens/vm_developer/vm_service_private_extensions.dart
+++ b/packages/devtools_app/lib/src/screens/vm_developer/vm_service_private_extensions.dart
@@ -55,33 +55,7 @@ extension IsolatePrivateViewExtension on Isolate {
       (json!['_heaps'] as Map).cast<String, Object?>();
 }
 
-/// An extension on [Class] which allows for access to VM internal fields.
-extension ClassPrivateViewExtension on Class {
-  /// The internal name of the [Class].
-  String get vmName => json![_vmNameKey];
-}
-
-/// An extension on [InboundReferences] which allows for access to
-/// VM internal fields.
-extension InboundReferenceExtension on InboundReferences {
-  static const _referencesKey = 'references';
-  static const _parentWordOffsetKey = '_parentWordOffset';
-
-  int? parentWordOffset(int inboundReferenceIndex) {
-    final references = (json![_referencesKey] as List?)?.cast<Object?>();
-    final inboundReference = (references?[inboundReferenceIndex] as Map?)
-        ?.cast<String, Object?>();
-    return inboundReference?[_parentWordOffsetKey] as int?;
-  }
-}
-
 class HeapStats {
-  const HeapStats({
-    required this.count,
-    required this.size,
-    required this.externalSize,
-  });
-
   const HeapStats.empty() : count = 0, size = 0, externalSize = 0;
 
   HeapStats.parse(List<int> stats)
@@ -172,10 +146,6 @@ extension ObjRefPrivateViewExtension on ObjRef {
   /// `true` if this object is an instance of [SubtypeTestCacheRef].
   bool get isSubtypeTestCache => vmType == _subtypeTestCache;
 
-  /// Casts the current [ObjRef] into an instance of [SubtypeTestCacheRef].
-  SubtypeTestCacheRef get asSubtypeTestCache =>
-      SubtypeTestCacheRef.fromJson(json!);
-
   /// `true` if this object is an instance of [WeakArrayRef].
   bool get isWeakArray => vmType == _weakArrayType;
 
@@ -273,9 +243,6 @@ class WeakArray extends WeakArrayRef implements Obj {
 class SubtypeTestCacheRef implements ObjRef {
   SubtypeTestCacheRef({required this.id, required this.json});
 
-  factory SubtypeTestCacheRef.fromJson(Map<String, dynamic> json) =>
-      SubtypeTestCacheRef(id: json['id'], json: json);
-
   @override
   bool? fixedId;
 
@@ -540,22 +507,15 @@ enum FunctionKind {
 /// An extension on [Code] which allows for access to VM internal fields.
 extension CodePrivateViewExtension on Code {
   static const _disassemblyKey = '_disassembly';
-  static const _kindKey = 'kind';
   static const _objectPoolKey = '_objectPool';
 
   /// Returns the disassembly of the [Code], which is the generated assembly
   /// instructions for the code's function.
   Disassembly get disassembly => Disassembly.parse(json![_disassemblyKey]);
+  @visibleForTesting
   set disassembly(Disassembly disassembly) =>
       json![_disassemblyKey] = disassembly.toJson();
 
-  /// The kind of code object represented by this instance.
-  ///
-  /// Can be one of:
-  ///   - Dart
-  ///   - Stub
-  String get kind => json![_kindKey];
-
   ObjectPoolRef get objectPool => ObjectPoolRef.parse(json![_objectPoolKey]);
 
   bool get hasInliningData => json!.containsKey(InliningData.kInlinedFunctions);
@@ -676,20 +636,6 @@ enum ObjectPoolEntryKind {
 
   static const _kObject = 'Object';
   static const _kImm = 'Immediate';
-  static const _kNativeFunction = 'NativeFunction';
-
-  static ObjectPoolEntryKind fromString(String type) {
-    switch (type) {
-      case _kObject:
-        return object;
-      case _kImm:
-        return immediate;
-      case _kNativeFunction:
-        return nativeFunction;
-      default:
-        throw UnsupportedError('Unsupported ObjectPoolType: $type');
-    }
-  }
 
   @override
   String toString() {
@@ -707,24 +653,19 @@ enum ObjectPoolEntryKind {
 class ObjectPoolEntry {
   const ObjectPoolEntry({
     required this.offset,
-    required this.kind,
     required this.value,
   });
 
   static const _offsetKey = 'offset';
-  static const _kindKey = 'kind';
   static const _valueKey = 'value';
 
   static ObjectPoolEntry parse(Map<String, dynamic> json) => ObjectPoolEntry(
     offset: json[_offsetKey],
-    kind: ObjectPoolEntryKind.fromString(json[_kindKey]),
     value: createServiceObject(json[_valueKey], [])!,
   );
 
   final int offset;
 
-  final ObjectPoolEntryKind kind;
-
   final Object value;
 }
 
@@ -850,14 +791,6 @@ class ObjectStore {
 ///
 /// See [CpuSamples].
 class ProfileCode {
-  ProfileCode({
-    this.kind,
-    this.inclusiveTicks,
-    this.exclusiveTicks,
-    this.code,
-    this.ticks,
-  });
-
   ProfileCode._fromJson(Map<String, dynamic> json) {
     kind = json['kind'] ?? '';
     inclusiveTicks = json['inclusiveTicks'] ?? -1;
@@ -883,6 +816,7 @@ class ProfileCode {
 
   List? ticks;
 
+  // ignore: unused-code, TODO(https://github.com/flutter/devtools/issues/9910) seems like a bug.
   Map<String, Object?> toJson() {
     final json = <String, Object?>{};
     json.addAll({
@@ -915,10 +849,6 @@ extension CpuSamplesPrivateView on CpuSamples {
 
   static const _kCodesKey = '_codes';
 
-  bool get hasCodes {
-    return _expando[this] != null || json!.containsKey(_kCodesKey);
-  }
-
   List<ProfileCode> get codes {
     return _expando[this] ??= (json![_kCodesKey] as List)
         .cast<Map<String, dynamic>>()
@@ -936,13 +866,11 @@ extension ProfileDataRanges on SourceReport {
 class ProfileReportEntry {
   const ProfileReportEntry({
     required this.sampleCount,
-    required this.line,
     required this.inclusive,
     required this.exclusive,
   });
 
   final int sampleCount;
-  final int line;
   final int inclusive;
   final int exclusive;
 
@@ -970,7 +898,6 @@ class ProfileReportRange {
       final line = lines[i];
       entries[line] = ProfileReportEntry(
         sampleCount: json.sampleCount,
-        line: line,
         inclusive: inclusiveTicks[i],
         exclusive: exclusiveTicks[i],
       );
diff --git a/packages/devtools_app/test/screens/debugger/debugger_screen_breakpoints_test.dart b/packages/devtools_app/test/screens/debugger/debugger_screen_breakpoints_test.dart
index 7470497d0f9..90594f9ccc1 100644
--- a/packages/devtools_app/test/screens/debugger/debugger_screen_breakpoints_test.dart
+++ b/packages/devtools_app/test/screens/debugger/debugger_screen_breakpoints_test.dart
@@ -56,9 +56,6 @@ void main() {
     ),
   ];
   final codeViewController = debuggerController.codeViewController;
-  when(
-    mockBreakpointManager.breakpoints,
-  ).thenReturn(ValueNotifier(breakpoints));
   when(
     mockBreakpointManager.breakpointsWithLocation,
   ).thenReturn(ValueNotifier(breakpointsWithLocation));
diff --git a/packages/devtools_app/test/screens/vm_developer/object_inspector/vm_object_pool_display_test.dart b/packages/devtools_app/test/screens/vm_developer/object_inspector/vm_object_pool_display_test.dart
index d0541ed1505..3c9c4eae83a 100644
--- a/packages/devtools_app/test/screens/vm_developer/object_inspector/vm_object_pool_display_test.dart
+++ b/packages/devtools_app/test/screens/vm_developer/object_inspector/vm_object_pool_display_test.dart
@@ -37,7 +37,6 @@ void main() {
       final objectPoolEntries = <ObjectPoolEntry>[
         ObjectPoolEntry(
           offset: 0,
-          kind: ObjectPoolEntryKind.object,
           value: InstanceRef(
             id: 'fake-inst',
             kind: InstanceKind.kList,
@@ -46,12 +45,10 @@ void main() {
         ),
         const ObjectPoolEntry(
           offset: 10,
-          kind: ObjectPoolEntryKind.immediate,
           value: 42,
         ),
         ObjectPoolEntry(
           offset: 20,
-          kind: ObjectPoolEntryKind.nativeFunction,
           value: FuncRef(id: 'func-id', name: 'Foo'),
         ),
       ];
diff --git a/packages/devtools_test/lib/src/helpers/utils.dart b/packages/devtools_test/lib/src/helpers/utils.dart
index a11e3657368..510471bb1b9 100644
--- a/packages/devtools_test/lib/src/helpers/utils.dart
+++ b/packages/devtools_test/lib/src/helpers/utils.dart
@@ -35,21 +35,6 @@ const safePumpDuration = Duration(seconds: 3);
 const longPumpDuration = Duration(seconds: 6);
 const veryLongPumpDuration = Duration(seconds: 9);
 
-final screenIds = <String>[
-  AppSizeScreen.id,
-  DebuggerScreen.id,
-  DeepLinksScreen.id,
-  InspectorScreen.id,
-  LoggingScreen.id,
-  MemoryScreen.id,
-  NetworkScreen.id,
-  PerformanceScreen.id,
-  ProfilerScreen.id,
-  ProviderScreen.id,
-  VMDeveloperToolsScreen.id,
-  DTDToolsScreen.id,
-];
-
 /// Scoping method which registers `listener` as a listener for `listenable`,
 /// invokes `callback`, and then removes the `listener`.
 ///
diff --git a/packages/devtools_test/lib/src/mocks/fake_service_manager.dart b/packages/devtools_test/lib/src/mocks/fake_service_manager.dart
index 35efaa85615..1b4027fedea 100644
--- a/packages/devtools_test/lib/src/mocks/fake_service_manager.dart
+++ b/packages/devtools_test/lib/src/mocks/fake_service_manager.dart
@@ -13,7 +13,6 @@ import 'package:flutter/foundation.dart';
 import 'package:mockito/mockito.dart';
 import 'package:vm_service/vm_service.dart';
 
-import '../helpers/utils.dart';
 import 'fake_isolate_manager.dart';
 import 'fake_service_extension_manager.dart';
 import 'fake_vm_service_wrapper.dart';
@@ -39,7 +38,8 @@ class FakeServiceConnectionManager extends Fake
       availableServices: availableServices,
       rootLibrary: rootLibrary,
     );
-    for (final screenId in screenIds) {
+    for (final screen in ScreenMetaData.values) {
+      final screenId = screen.id;
       when(errorBadgeManager.erroredItemsForPage(screenId)).thenReturn(
         FixedValueListenable(LinkedHashMap<String, DevToolsError>()),
       );
diff --git a/packages/devtools_test/lib/src/mocks/mocks.dart b/packages/devtools_test/lib/src/mocks/mocks.dart
index d4fd88878fb..ca204b350f6 100644
--- a/packages/devtools_test/lib/src/mocks/mocks.dart
+++ b/packages/devtools_test/lib/src/mocks/mocks.dart
@@ -237,6 +237,7 @@ Script? _loadScript(String scriptName) {
   return Script.parse(jsonDecode(script.readAsStringSync()));
 }
 
+// ignore: invalid_use_of_visible_for_testing_member, devtools_test is only used in tests.
 final mockSyntaxHighlighter = SyntaxHighlighter.withGrammar(
   grammar: mockGrammar,
   source: mockScript!.source,
@@ -249,10 +250,10 @@ const coverageMissLines = <int>{2, 5};
 const executableLines = <int>{...coverageHitLines, ...coverageMissLines};
 
 const profilerEntries = <int, ProfileReportEntry>{
-  1: ProfileReportEntry(sampleCount: 5, line: 1, inclusive: 2, exclusive: 2),
-  3: ProfileReportEntry(sampleCount: 5, line: 3, inclusive: 1, exclusive: 1),
-  4: ProfileReportEntry(sampleCount: 5, line: 4, inclusive: 1, exclusive: 1),
-  7: ProfileReportEntry(sampleCount: 5, line: 7, inclusive: 1, exclusive: 1),
+  1: ProfileReportEntry(sampleCount: 5, inclusive: 2, exclusive: 2),
+  3: ProfileReportEntry(sampleCount: 5, inclusive: 1, exclusive: 1),
+  4: ProfileReportEntry(sampleCount: 5, inclusive: 1, exclusive: 1),
+  7: ProfileReportEntry(sampleCount: 5, inclusive: 1, exclusive: 1),
 };
 
 final mockParsedScript = ParsedScript(