code: def __contains__(self, key):
      if self.node.op == "placeholder":
          # this is used to handle like
          # if x in kwargs
          # we don't handle this case for now
          return False
      return super().__contains__(key)
  
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 14 for calling the ColoProxy obj's underlying member method code with example usage: obj.__contains__(key) and returns: super, False