code: def register_backend_method(cls, name, fun_or_attr):
      cls.current_backend().register_method(name, fun_or_attr)
  
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 11 for calling the BackendManager obj's underlying member method code with example usage: obj.register_backend_method(cls, name, fun_or_attr) without return types