code: def old_status(self, old_status):
          
          allowed_values = ["NEW", "DONE", "REJECTED"]
          if old_status not in allowed_values:
              raise ValueError(
                  "Invalid value for `old_status` ({0}), must be one of {1}"
                  .format(old_status, allowed_values)
              )
  
          self._old_status = old_status
docs: Sets the old_status of this BuildSetStatusChangedEvent.
  
          :param old_status: The old_status of this BuildSetStatusChangedEvent.
          :type: str