8 files declare their use of DevelDumperManagerInterface in Devel 4.x

ContainerInfoController.php in src/Controller/ContainerInfoController.php

Debug.php in src/Twig/Extension/Debug.php

DevelController.php in src/Controller/DevelController.php

DumperTestController.php in tests/modules/devel_dumper_test/src/Controller/DumperTestController.php

ElementInfoController.php in src/Controller/ElementInfoController.php

EntityDebugController.php in src/Controller/EntityDebugController.php

EntityTypeInfoController.php in src/Controller/EntityTypeInfoController.php

RouteInfoController.php in src/Controller/RouteInfoController.php