code: def __contains__(self, key: str):
      return getattr(self, key, None) is not None
  
imports: from collections import namedtuple
  import os
  from typing import Any, Optional
  from metaflow.metaflow_config import TEMPDIR
label_desc: Use image node_id 4 for calling the Current obj's underlying member method code with example usage: obj.__contains__(key) and returns: unknown