def _last_index(self, s):
        self.set_index(max(0, self._find_one_after_last_labeled_index() - 1))
def get_long_running_output(pipeline_response):
            deserialized = self._deserialize('CalculateExchangeOperationResultResponse', pipeline_response)

            if cls:
                return cls(pipeline_response, deserialized, {})
            return deserialized