code: def get_backend_dir(cls):
      return cls._attributes + cls._functions
  
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 5 for calling the BackendManager obj's underlying member method code with example usage: obj.get_backend_dir(cls) and returns: unknown