code: public Enumeration listMessagingEngines() {
      if (!isInitialized()) {
        Vector v = new Vector();
        return v.elements();
      }
      return _jsmain.listMessagingEngines();
    }
docs: /* (non-Javadoc)
  @see com.ibm.ws.sib.admin.JsAdminService#listMessagingEngines()