code: def __call__(self, *args, **kwargs):
      return self.tracer.create_proxy(
          "call_method", self.attr, (self.root,) + args, kwargs
      )
  
imports: import operator
  from typing import Any, Callable, Dict, Optional, Union
  import torch
  from torch.fx import Node, Proxy
  from torch.utils._pytree import tree_map
  from colossalai._analyzer._subclasses import MetaTensor
label_desc: Use image node_id 3 for calling the ColoAttribute obj's underlying member method code with example usage: obj.__call__() and returns: self