[QUESTION] replacing particular text in dropped component

Hi, I get the value from custom traits from what I entered but I don't know how to change the particular value in dropped component and render into the canvas

my screenshot

what I really want is to replace the regular text value to which I have entered in custom traits u can see in my screenshot

my custom traits is

 comps.addType('segment-type', {

      model: defaultModel.extend({
        // Extend default properties
        defaults: Object.assign({}, defaultModel.prototype.defaults, {
          // Can be dropped only inside `form` elements
          draggable: '*',
          // Can't drop other elements inside it
          droppable: true,
          // Traits (Settings)
          traits: [{
            type: 'text',
            label: 'segmentButton1',
            placeholder: 'Regular',
            name: 'segmentButton1',
            changeProp: 1
          }, {
            type: 'text',
            label: 'segmentButton2',
            placeholder: 'Urgent',
            name: 'segmentButton2',
            changeProp: 1
          }],
        }),
        toHTML: function() {
        },
        init() {
          this.listenTo(this, 'change:segmentButton1', this.firstButton);
          this.listenTo(this, 'change:segmentButton2', this.secondButton);
        },
        firstButton() {
          //do something 
          var segmentButton = document.getElementsByTagName('ion-segment-button');
          btn1 = segmentButton[segmentButton.length - 2];
        },
        secondButton() {
          var segmentButton = document.getElementsByTagName('ion-segment-button');
          btn2 = segmentButton[segmentButton.length - 1];
        },

      }, {
        isComponent: function (el) {
          if (el.tagName == 'ion-segment') {
            return {
              type: 'segment-type'
            };
          }
        },
      }),

      // Define the View
      view: defaultType.view,
    });

here I try to get dropped element but it shows undefined. Can u please help me

Thanks.