title: How do you remove a node?
body: <p>May I get an example?
  To add a node, I do this:</p>
  
  <pre><code>let thisNode = thisScene.rootNode.childNodeWithName("someGraphic", recursively: true)
  scene.rootNode.addChildNode(thisNode!)
  </code></pre>
  
  <p>Now how do I remove it? I've read <a href="https://developer.apple.com/library/prerelease/ios/documentation/SceneKit/Reference/SCNNode_Class/index.html#//apple_ref/occ/instm/SCNNode/removeFromParentNode" rel="nofollow">this</a> backwards and forwards and still can't do it.</p>