docs: def _is_builtin_module(module):
      """Is builtin or part of standard library
      """
      if (not hasattr(module, '__file__')) or  module.__name__ in sys.builtin_module_names:
          return True
      if module.__name__ in _stdlib._STD_LIB_MODULES:
          return True
      amp = os.path.abspath(module.__file__)
      if 'site-packages' in amp:
          return False
      if amp.startswith(_STD_MODULE_DIR):
          return True
      if not '.' in module.__name__:
          return False
      mn_top = module.__name__.split('.')[0]
      return mn_top in _stdlib._STD_LIB_MODULES