8 files declare their use of ConfigMapperManagerInterface in Drupal 9

ConfigTranslationContextualLinks.php in core/modules/config_translation/src/Plugin/Derivative/ConfigTranslationContextualLinks.php

ConfigTranslationController.php in core/modules/config_translation/src/Controller/ConfigTranslationController.php

ConfigTranslationDeleteForm.php in core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php

ConfigTranslationFormBase.php in core/modules/config_translation/src/Form/ConfigTranslationFormBase.php

ConfigTranslationListController.php in core/modules/config_translation/src/Controller/ConfigTranslationListController.php

ConfigTranslationLocalTasks.php in core/modules/config_translation/src/Plugin/Derivative/ConfigTranslationLocalTasks.php

ConfigTranslationOverviewAccess.php in core/modules/config_translation/src/Access/ConfigTranslationOverviewAccess.php

RouteSubscriber.php in core/modules/config_translation/src/Routing/RouteSubscriber.php