code: def _assert_is_of_norm_type(type_str, valid_type_strs, arg_name):
      assert type_str in valid_type_strs, (
          "Got an unknown datatype for argument '%s'. "
          "Expected datatypes were: %s. Got: %s."
          % (arg_name, ", ".join(valid_type_strs), type_str)
      )
  
imports: from __future__ import print_function, division, absolute_import
  import functools
  import numpy
  from ..None import imgaug
  from ..None import dtypes
  from .base import IAugmentable
label_desc: Use image node_id 23 for calling a global function with example usage: _assert_is_of_norm_type(type_str, valid_type_strs, arg_name) without return types