text: import Ext_MessageBox from './Ext/MessageBox.js';
  import ElementParser from './ElementParser.js';
  
  export default class EWCMessagebox extends Ext_MessageBox {
    constructor() {
      super ([], []);
      this.xtype = 'messagebox';
    }
  }
  try {
    window.customElements.define('ext-messagebox', ElementParser.withParsedCallback(EWCMessagebox));
  }
  catch(e) {
    window.customElements.define('ext-messagebox', EWCMessagebox);
  }
  