This reverts commit 3070baf1.

* Set IconButton's visualDensity to standard
Co-authored-by: Qun Cheng <quncheng@google.com>

* Hide the debug banner in the PopupMenuButton example

* Add test to verify that debug banner is not shown

Explain the "patching" protocol in `KeyMessageManager.keyMessageHandler` and add an example (#105280)

* Added an example for IndexedStack

* Added tests for the IndexedStack example

* Fixed type issue for onSubmitted callback functions

* Fixed documentation and moved files to their appropriate places

* Fixed documentation and moved files to their appropriate places

* Moved test files to their appropriate places

* Moved test files to their appropriate places

* Fixed file path in documentation

* Remove trailing space

* Formatting changes

* Remove extra line

* Further formatting changes

* Further formatting changes

* fix comma and inline
Co-authored-by: Greg Spencer <gspencergoog@users.noreply.github.com>

* Formatting

* indentation and formatting

* Formatting

* Formatting

* Formatting

* Removed duplicate chevron

* better wording on documentation
Co-authored-by: Tong Mu <dkwingsmt@users.noreply.github.com>

* Added testing for state preservation
Co-authored-by: Greg Spencer <gspencergoog@users.noreply.github.com>
Co-authored-by: Tong Mu <dkwingsmt@users.noreply.github.com>

This reverts commit 180566f2.

* use `flutter_lints` for sample code

* update packages

* Revert "update packages"

This reverts commit 14da3c69a8da9a093ad9c2acd3fc5d6c7f7751ed.

* revert

* `Switch`: Add an interactive examples

* Update docs

* Update doc

* Replace references to LinearProgressIndicator in CircularProgressIndicator example

* Add test

* fix copyright header

* `CupertinoTabScaffold`/`CupertinoTabController`: Add interactive examples

* fix class name in the test

* Kick tests

`DropdownButton`: Update `selectedItemBuilder` example to show case item alignment and update DropdownButton examples (#102748)

Update

* `CupertinoFormRow`: Add an interactive example

* fix typo

* Update docs

* `CupertinoSearchTextField`: Add interactive examples

* Update docs