BlockFormTest.php in core/modules/block/tests/src/Unit/BlockFormTest.php
ForumBlockBase.php in core/modules/forum/src/Plugin/Block/ForumBlockBase.php
InlineBlock.php in core/modules/layout_builder/src/Plugin/Block/InlineBlock.php
PreviewAwareBlock.php in core/modules/layout_builder/tests/modules/layout_builder_test/src/Plugin/Block/PreviewAwareBlock.php
ViewsBlockBase.php in core/modules/views/src/Plugin/Block/ViewsBlockBase.php