code: def __repr__(self) -> str:
      return 'Parameter placeholder ("{}")'.format(self._param_name)
  
imports: import abc
  from collections import OrderedDict
  from contextlib import contextmanager
  import typing
  import weakref
  import warnings
  import torch
  from .None import utils
label_desc: Use image node_id 2 for calling the _ParameterPlaceholder obj's underlying member method code with example usage: obj.__repr__() and returns: str