* Adds a semantics node flag to identify sliders.

* [fuchsia] Fix roll of engine PR #25167

This changes fixes tests failing due to new isKeyboardKey semantics
flag.

* Fix typo
Co-authored-by: Zachary Anderson <zanderso@users.noreply.github.com>

Update samples to use repo analysis options, Fix sample templates and a ton of analyzer issues (#77868)

* Adds set text semantics action to render editable

* addressing comments

* re-enable test

* fix test

* fix more test

* fix bad merge

* addressing comment

* update dynamic to Object?

This reverts commit ceca634e.

Remove references to `Window`, and switch usages to `PlatformDispatcher` or `SingletonFlutterWindow` (#69617)

* Remove references to dart:ui.Window, and point usages to PlatformDispatcher or SingletonFlutterWindow, as appropriate

* remove new test platform dispatchers

* Amend documentation

* Fix crash when widgetspan does not produce a semantics node in render paragraph

* fix comments

* fixed corner case, added test, refactored semantics widget

* addressing comment

Reland "Add CompositedTransformFollower.{followerAnchor, leaderAnchor} for custom anchoring (#64930)" (#65871) (#65884)

* apply upcoming lint cast_nullable_to_non_nullable

* make RenderObjectElement.renderObject non-nullable

Revert "Add CompositedTransformFollower.{followerAnchor, leaderAnchor} for custom anchoring (#64930)" (#65871)

This reverts commit 2fbb529d.

This allows us to rationalize the nullability of some of our APIs.
Prior to this we'd end up in a situation where Container assumed that
getClipPath would be non-null but Decoration was ok with return null.

* Redesigns the interface between MouseTracker and RendererBinding&RenderView.
* Simplifies the structure of RenderMouseRegion.
* Extracts the common utility code between mouse_tracker_test and mouse_tracker_cursor_test.

Reland of acdb909f with fixes to semantics.dart

#61042

* Add punctuation for unterminated sentences in doc comments

* Addressing review nit