docs: public MessageReceiverFilterList getMessageFilterList()
      {
          if (m_filterList == null)
          {
              String strFilterType = null;
              App app = this.getMessageQueue().getMessageManager().getApplication();
              if (app != null)
                  strFilterType = app.getProperty(MessageConstants.MESSAGE_FILTER);
              if (MessageConstants.TREE_FILTER.equals(strFilterType))
                  m_filterList = new TreeMessageFilterList(this);
          }
          return super.getMessageFilterList();
      }