def rollback(self):
        # PEP 249
        raise NotSupportedError
@returns a representation compatible with opencv.
dataset/ETHPy150Open cloudera/impyla/impala/hiveserver2.py/HiveServer2Connection.rollback--crossover with--dataset/ETHPy150Open bolme/pyvision/src/pyvision/types/Rect.py/Rect.asOpenCV