@classmethod
  def _unknown_property(cls, name):
    """Internal helper to raise an exception for an unknown property name.

    This is called by _check_properties().  It is overridden by
    Expando, where this is a no-op.

    Raises:
      InvalidPropertyError.
    """
    raise InvalidPropertyError('Unknown property %s' % name)
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/Model._unknown_property/original