class_docstr: Sentintel object - used for defaults where None
  may be a valid (non-default) value.
  
  This class is an enum so it may used as a Literal
  type annotation, e.g Literal[UNSET].
code: def __bool__(self) -> Literal[False]:
      return False
  
file_path: pennylane/pennylane/data/base/typing_util.py
imports: from enum import Enum
  from functools import lru_cache
  from typing import Any, Dict, ForwardRef, List, Literal, Optional, Tuple, Type, TypeVar, Union, _SpecialForm, get_args, get_origin
label_desc: Use image node_id 1 for calling the UnsetType obj's underlying member method code with example usage: obj.__bool__() and returns: False