31 files declare their use of EditorInterface

Alignment.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Alignment.php
AlignmentPluginTest.php in core/modules/ckeditor5/tests/src/Unit/AlignmentPluginTest.php
ckeditor.module in core/modules/ckeditor/ckeditor.module
Provides integration with the CKEditor WYSIWYG editor.
CKEditor5.php in core/modules/ckeditor5/src/Plugin/Editor/CKEditor5.php
CKEditor5PluginDefault.php in core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefault.php
CKEditor5PluginInterface.php in core/modules/ckeditor5/src/Plugin/CKEditor5PluginInterface.php
CKEditor5PluginManager.php in core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php
CKEditor5PluginManagerInterface.php in core/modules/ckeditor5/src/Plugin/CKEditor5PluginManagerInterface.php
CKEditor5UpdateImageToolbarItemTest.php in core/modules/ckeditor5/tests/src/Functional/Update/CKEditor5UpdateImageToolbarItemTest.php
CKEditor5ValidationTestTrait.php in core/modules/ckeditor5/tests/src/Kernel/CKEditor5ValidationTestTrait.php
Editor.php in core/modules/editor/src/Entity/Editor.php
EditorMediaDialog.php in core/modules/media/src/Form/EditorMediaDialog.php
EditorMediaDialogTest.php in core/modules/media/tests/src/Kernel/EditorMediaDialogTest.php
FundamentalCompatibilityConstraintValidator.php in core/modules/ckeditor5/src/Plugin/Validation/Constraint/FundamentalCompatibilityConstraintValidator.php
GlobalAttribute.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/GlobalAttribute.php
Heading.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Heading.php
HeadingPluginTest.php in core/modules/ckeditor5/tests/src/Unit/HeadingPluginTest.php
Image.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Image.php
Language.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Language.php
LanguagePluginTest.php in core/modules/ckeditor5/tests/src/Unit/LanguagePluginTest.php
ListPlugin.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/ListPlugin.php
Media.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Media.php
MediaLibrary.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/MediaLibrary.php
PluginManagerDependentValidatorTrait.php in core/modules/ckeditor5/src/Plugin/Validation/Constraint/PluginManagerDependentValidatorTrait.php
SmartDefaultSettings.php in core/modules/ckeditor5/src/SmartDefaultSettings.php
SourceEditing.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/SourceEditing.php
SourceEditingPluginTest.php in core/modules/ckeditor5/tests/src/Unit/SourceEditingPluginTest.php
Style.php in core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/Style.php
StylePluginTest.php in core/modules/ckeditor5/tests/src/Unit/StylePluginTest.php
TextEditorObjectDependentValidatorTrait.php in core/modules/ckeditor5/src/Plugin/Validation/Constraint/TextEditorObjectDependentValidatorTrait.php
ValidatorsTest.php in core/modules/ckeditor5/tests/src/Kernel/ValidatorsTest.php

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