src/templates/bootstrap/builder.js

export default {
  form: ` 
<div class="formio builder row formbuilder">
  <div class="col-xs-4 col-sm-3 col-md-2 formcomponents">
    {{sidebar}}
  </div>
  <div class="col-xs-8 col-sm-9 col-md-10 formarea" ref="form">
    {{form}}
  </div>
</div>
`,
};