code: def _is_not_none(self, key: Union[str, Enum]):
      return (
          self._key_to_str(key) in self._dict
          and self.get(key) is not None
      )
  
imports: from enum import Enum
  from typing import Union, Callable, Any, Dict, Optional, Type, List, Generic, TypeVar
label_desc: Use image node_id 30 for calling the FluentDict obj's underlying member method code with example usage: obj._is_not_none(key) and returns: unknown