8 files declare their use of FormModeManagerInterface in Form mode manager 8

DefaultRouteSubscriber.php in src/Routing/EventSubscriber/DefaultRouteSubscriber.php

EntityFormModeBase.php in src/Controller/EntityFormModeBase.php

FormModeManagerConverter.php in src/ParamConverter/FormModeManagerConverter.php

FormModeManagerForm.php in src/Form/FormModeManagerForm.php

FormModeManagerLinksForm.php in src/Form/FormModeManagerLinksForm.php

FormModeManagerLocalAction.php in src/Plugin/Derivative/FormModeManagerLocalAction.php

FormModeManagerLocalTasks.php in src/Plugin/Derivative/FormModeManagerLocalTasks.php

FormModesSubscriber.php in src/Routing/EventSubscriber/FormModesSubscriber.php