def to_dict(self):
        as_dict = dict(self.payload or ())
        as_dict['message'] = self.message
        return as_dict
List group statistics
dataset/ETHPy150Open jeffknupp/flask_sandboy/flask_sandboy/exception.py/EndpointException.to_dict--crossover with--dataset/ETHPy150Open dave-tucker/hp-sdn-client/hpsdnclient/of.py/OfMixin.get_group_stats