@property
def payloads(self):
    for model_name in self._payloads:
        for key in self._payloads[model_name]:
            (yield (model_name, key, self._payloads[model_name][key]))
@property
def payloads(self):
    for model_name in self._payloads:
        for key in self._payloads[model_name]:
            (yield (model_name, key, self._payloads[model_name][key]))