8 files declare their use of LayoutBuilderHighlightTrait in Drupal 8

AddBlockForm.php in core/modules/layout_builder/src/Form/AddBlockForm.php

ChooseBlockController.php in core/modules/layout_builder/src/Controller/ChooseBlockController.php

ChooseSectionController.php in core/modules/layout_builder/src/Controller/ChooseSectionController.php

ConfigureSectionForm.php in core/modules/layout_builder/src/Form/ConfigureSectionForm.php

LayoutBuilder.php in core/modules/layout_builder/src/Element/LayoutBuilder.php

LayoutRebuildConfirmFormBase.php in core/modules/layout_builder/src/Form/LayoutRebuildConfirmFormBase.php

MoveBlockForm.php in core/modules/layout_builder/src/Form/MoveBlockForm.php

UpdateBlockForm.php in core/modules/layout_builder/src/Form/UpdateBlockForm.php