title: ComponentQuery selector for child elements only
body: <p>I have a set of Controller/View that are composed dynamically, each one have a "selector" list and a "container", such container can have another selector+container pair, and so on. Which are instances of the same root selector+container Controller.</p>
  
  <p>This is the heading definition of the Controller  (the abstract class):</p>
  
  <pre><code>Ext.define('MyApp.controller.explorer.Base', {
      extend: 'Ext.app.Controller',
      refs: [
          {ref: 'explorerContainer', selector: '[itemId="explorerContainer]'},
          {ref: 'explorerSelector', selector: '[itemId="explorerSelector]'}
      ],
  </code></pre>
  
  <p>The thing is I don't know what should be the ComponentQuery selector to match only the child elements of my controller with such itemId. Because by using [itemId="explorerContainer"] to match the component it does so globally, answering the top-most container in the composition tree.</p>
  
  <p>In previous experiments I did with ExtJS 3 I accessed child elements by means of myComponent.getComponent('...'), but now there's no getComponent() and I could'n find an equivalent in ExtJS 4.</p>
  
  <p>Thanks in advance.</p>