title: How does UIAutomation determine whether a UIAElement.isVisible()
body: <p>I have a view with the following structure:</p>
  
  <pre><code>GrandView
  -Parent View1
  -Parent View2
  --Child View1
  --Child View2
  </code></pre>
  
  <p>The child views take up almost all of the bounds of <code>Parent View2</code>, but there is still some space around the edges.  I can select <code>Parent View2</code> in the simulator with the accessibility inspector if I click on the edges.  I can also tap <code>Parent View2</code> in UIAutomation if I use:</p>
  
  <pre><code>tapWithOptions({tapOffset:{x:0.15, y:0.95}});
  </code></pre>
  
  <p>However, my calls to <code>isVisible()</code> always return <code>0</code>.  I expect that if I can tap the element, or select it with the accessibility inspector, it should return <code>1</code>.</p>
  
  <p>How does UIAutomation determine whether a <code>UIAElement</code> is visible?</p>