title: How to use Ext.list.Tree component in an application?
body: <p><a href="http://docs.sencha.com/extjs/6.0" rel="nofollow">Extjs 6</a> add a component with <a href="http://docs.sencha.com/extjs/6.0/6.0.0-classic/#!/api/Ext.list.Tree" rel="nofollow">Ext.list.Tree</a>.  I want to use this component in my application. But I do everything and I'm not successful.  </p>
  
  <p><strong>How can I use this component</strong>? <strong>Can you present any sample code</strong>?</p>