if value is None:
self.constraintStoreSerial = None
self.violationListSerial = None
elif self.topObject.nmrProject is value.topObject.nmrProject:
self.constraintStoreSerial = value.nmrConstraintStore.serial
self.violationListSerial = value.serial
else:
raise ApiError("%s does not belong to NmrCalcStore.nmrProject %s" % (value,self.topObject.nmrProject ))