def _rebind_actor_methods(worker_group, actor_name):
            """
            bind the method with actor_prefix to its original name
            """
            prefix: str = actor_name + '_'
            for method_name in dir(worker_group):
                if method_name.startswith(prefix):
                    # only valid when Python >= 3.9
                    original_method_name = method_name.removeprefix(prefix)
                    method = getattr(worker_group, method_name)
                    setattr(worker_group, original_method_name, method)

            bind the method with actor_prefix to its original name
            
verl/single_controller/ray/base.py