code: public JsMessagingEngine getMessagingEngine(String busName, String engine) {
      if (!isInitialized()) {
        return null;
      }
      return _jsmain.getMessagingEngine(busName, engine);
    }
docs: /* (non-Javadoc)
  @see com.ibm.ws.sib.admin.JsAdminService#getMessagingEngine(java.lang.String, java.lang.String)