code: public BaseConvertToMessage getConvertToMessage()
      {
          if (m_convertToMessage == null)
          {
              BaseMessageHeader trxMessageHeader = this.getMessage().getMessageHeader();
              String strMessageClass = (String)trxMessageHeader.get(TrxMessageHeader.MESSAGE_MARSHALLER_CLASS);
              String strPackage = (String)trxMessageHeader.get(TrxMessageHeader.BASE_PACKAGE);
              strMessageClass = ClassServiceUtility.getFullClassName(strPackage, strMessageClass);
              m_convertToMessage = (BaseConvertToMessage)ClassServiceUtility.getClassService().makeObjectFromClassName(strMessageClass);
              if (m_convertToMessage != null)
              	m_convertToMessage.init(this);
          }
          return m_convertToMessage;
      }
docs: Get the unmarshaller.
  @return