code: public void setMessageControlClassification(String value) {
          if (value != null) {
              getHdr2().setField(JsHdr2Access.MESSAGECONTROLCLASSIFICATION_DATA, value);
          }
          else {
              getHdr2().setChoiceField(JsHdr2Access.MESSAGECONTROLCLASSIFICATION, JsHdr2Access.IS_MESSAGECONTROLCLASSIFICATION_EMPTY);
          }
      }
docs: /*
  Set the Message Control Classification into the message header.
  
  Javadoc description supplied by JsApiMessage interface.