text: Ext.define('KitchenSink.view.binding.Formula', {
      extend: 'Ext.form.Panel',
  
      // <example>
      otherContent: [{
          type: 'ViewModel',
          path: 'modern/src/view/binding/FormulaModel.js'
      }],
      // </example>
      
      viewModel: 'binding-formula',
  
      shadow: true,
      cls: 'demo-solid-background',
  
      items: {
          xtype: 'fieldset',
          instructions: 'As the field changes, the formula calculates the 2x and 4x values.',
          items: [{
              xtype: 'spinnerfield',
              label: 'Number',
              stepValue: 1,
              bind: '{x}'
          }, {
              xtype: 'textfield',
              readOnly: true,
              label: 'Times 2',
              bind: '{x} * 2 = {twice}'
          }, {
              xtype: 'textfield',
              readOnly: true,
              label: 'Times 4',
              bind: '{x} * 4 = {quad}'
          }]
      }
  });
  