15 files declare their use of ModuleExtensionList
- AdminController.php in core/modules/ system/ src/ Controller/ AdminController.php 
- ConfigImporter.php in core/lib/ Drupal/ Core/ Config/ ConfigImporter.php 
- ConfigImportSubscriber.php in core/lib/ Drupal/ Core/ EventSubscriber/ ConfigImportSubscriber.php 
- ConfigSingleImportForm.php in core/modules/ config/ src/ Form/ ConfigSingleImportForm.php 
- ConfigSync.php in core/modules/ config/ src/ Form/ ConfigSync.php 
- DrupalMedia.php in core/modules/ media/ src/ Plugin/ CKEditorPlugin/ DrupalMedia.php 
- DrupalMediaLibrary.php in core/modules/ media_library/ src/ Plugin/ CKEditorPlugin/ DrupalMediaLibrary.php 
- HelpController.php in core/modules/ help/ src/ Controller/ HelpController.php 
- InstallerModuleExtensionList.php in core/lib/ Drupal/ Core/ Installer/ InstallerModuleExtensionList.php 
- ModuleRequiredByThemesUninstallValidatorTest.php in core/tests/ Drupal/ Tests/ Core/ Extension/ ModuleRequiredByThemesUninstallValidatorTest.php 
- ModulesListForm.php in core/modules/ system/ src/ Form/ ModulesListForm.php 
- ModulesUninstallConfirmForm.php in core/modules/ system/ src/ Form/ ModulesUninstallConfirmForm.php 
- ModulesUninstallForm.php in core/modules/ system/ src/ Form/ ModulesUninstallForm.php 
- SystemController.php in core/modules/ system/ src/ Controller/ SystemController.php 
- UpdateManager.php in core/modules/ update/ src/ UpdateManager.php 
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