@classmethod
  def _ndb_repr(cls, entity):
    return str(entity._to_pb())
build a dict with params
dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/src/mapreduce/context.py/_MutationPool._ndb_repr--crossover with--dataset/ETHPy150Open rochacbruno/python-pagseguro/pagseguro/__init__.py/PagSeguro.build_checkout_params