docs: def clean_recently_opened_state_machines(self):
          """Remove state machines who's file system path does not exist"""
          state_machine_paths = self.get_config_value('recently_opened_state_machines', [])
          filesystem.clean_file_system_paths_from_not_existing_paths(state_machine_paths)
          self.set_config_value('recently_opened_state_machines', state_machine_paths)