code: def _is_none_type(type_: Any) -> bool:
      return type_ is None or type_ is type(None)
  
file_path: tvm/python/tvm/tir/schedule/_type_checker.py
imports: import collections
  import collections.abc
  import functools
  import inspect
  from typing import Any, Callable, Dict, List, Optional, Tuple, TypeVar, Union
  import typing
label_desc: Use image node_id 1 for calling a global function with example usage: _is_none_type(type_) and returns: unknown