@@ -133,7 +133,7 @@ absl::optional<absl::string_view> ByteString::TryFlat() const {
       if (auto flat = rep_.large.data->TryFlat(); flat.has_value()) {
         return flat->substr(rep_.large.offset, rep_.large.size);
       }
-      return absl::nullopt;
+      return std::nullopt;
     }
   }
 }
Original file line number	Diff line number	Diff line change
`@@ -133,7 +133,7 @@ absl::optional<absl::string_view> ByteString::TryFlat() const {`
`133`	`133`	`if (auto flat = rep_.large.data->TryFlat(); flat.has_value()) {`
`134`	`134`	`return flat->substr(rep_.large.offset, rep_.large.size);`
`135`	`135`	`}`
`136`		`- return absl::nullopt;`
	`136`	`+ return std::nullopt;`
`137`	`137`	`}`
`138`	`138`	`}`
`139`	`139`	`}`