src/app/components/demo.html

<div class="row">
  <div class="col-xs-12">
    <h1>Xos Sample GUI Extension</h1>
  </div>
  <div class="col-xs-12">
    <p>This page is loaded from an external container!</p>
  </div>
  <div class="col-xs-12">
    From this extension you can use all the feature provided by the core, <br/>
    for example you can toggle the side panel injecting custom content.
    <br/>
    <br/>
    <a ng-click="vm.togglePanel()" class="btn btn-success">Open Side Panel</a>
  </div>
</div>