@classmethod
  def kind(cls):
    if cls is cls.__root_class__:
      return super(PolyModel, cls).kind()
    else:
      return cls.__root_class__.kind()
Get kind of polymorphic model.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/db/polymodel.py/PolyModel.kind