code: def numpy_dtype(dtype):
      if dtype is None:
          return None
      if hasattr(dtype, "as_numpy_dtype"):
          return dtype.as_numpy_dtype
      return dtype
  
file_path: probability/tensorflow_probability/python/internal/backend/numpy/_utils.py
imports: import functools
  import importlib
  import types
  import numpy
  from tensorflow_probability.python.internal.backend.numpy import nest
label_desc: Use image node_id 3 for calling a global function with example usage: numpy_dtype(dtype) and returns: dtype, None, dtype