def _streaming_output_request(requests_pb2):
    request = requests_pb2.StreamingOutputCallRequest()
    sizes = [1, 2, 3]
    request.response_parameters.add(size=sizes[0], interval_us=0)
    request.response_parameters.add(size=sizes[1], interval_us=0)
    request.response_parameters.add(size=sizes[2], interval_us=0)
    return request