docs: def _clear_ignore(endpoint_props):
      '''
      Both _clear_dict and _ignore_keys in a single iteration.
      '''
      return dict(
          (prop_name, prop_val)
          for prop_name, prop_val in six.iteritems(endpoint_props)
          if prop_name not in _DO_NOT_COMPARE_FIELDS and prop_val is not None
      )