code: def __dir__(cls):
      additionals = [
          "dynamically_dispatched_class_attribute",
          "backend_manager",
          "BackendManager",
      ]
      return cls.get_backend_dir() + additionals
  
imports: import warnings
  from .core import Backend, backend_array
  import importlib
  import os
  import threading
  from contextlib import contextmanager
  import inspect
  import types
  import sys
label_desc: Use image node_id 12 for calling the BackendManager obj's underlying member method code with example usage: obj.__dir__(cls) and returns: unknown