code: def format_caller_argument_signature(self):
      return _create_caller_signature(self)
  
file_path: nnabla/python/src/nnabla/utils/signature_utils.py
imports: import inspect
label_desc: Use image node_id 6 for calling the SignatureEx obj's underlying member method code with example usage: obj.format_caller_argument_signature() and returns: _create_caller_signature