def manipulator(self):
    if self._manipulator is None:
      msg = ('MeasurementInterface.manipulator() must be implemented or a '
             '"manipulator=..." must be provided to the constructor')
      log.error(msg)
      raise Exception(msg)
    return self._manipulator
Initial Season Factors should be presetable
dataset/ETHPy150Open jansel/opentuner/opentuner/measurement/interface.py/MeasurementInterface.manipulator--crossover with--dataset/ETHPy150Open T-002/pycast/pycast/tests/methodtest.py/HoltWintersMethodTest.preset_season_factor_test