docs: public Object get(String strKey)
      {
          Object objData = super.get(strKey);
          if (objData == null)
              if (m_mapMessageHeader != null)
                  objData = m_mapMessageHeader.get(strKey);
          if (objData == null)
              if (m_mapMessageInfo != null)
                  objData = m_mapMessageInfo.get(strKey);
          if (objData == null)
              if (m_mapMessageTransport != null)
                  objData = m_mapMessageTransport.get(strKey);
          return objData;
      }