title: Calling children inside getChildByName / getChild At?
body: <p>I found out that I can't target a object inside the main MC if I use getChildAt / getChildByName. It will return me</p>
  
  <pre><code>Error #1119: Access of possibly undefined property someProperty through a reference with static type flash.display:DisplayObject.
  </code></pre>
  
  <p>I was trying to use something like</p>
  
  <pre><code>this.getChildAt(0).getChildByName("objectName")....
  </code></pre>