text: import './TreeHierarchyComponent.css';
  
  export default class TreeHierarchyComponent {
  
    constructor () {
      console.log('in TreeHierarchyComponent constructor');
    }
  
    readyButton1(event) {
      var cmp = event.detail.cmp;
      this.button1Cmp = event.detail.cmp;
    }
  
    tapButton1(event) {
      this.button1Cmp.setText(new Date())
    }
  
  }
  