title: Dojo - Adding dijit to a closed TitlePane
body: <p>When the open property of TitlePane is set to false, I can't add an widgets dynamically to the content.</p>
  
  <p>For example, the following code does not work.</p>
  
  <pre><code>var tp = new dijit.TitlePane({
     title: "Title Pane"
     , content: ""
     , open: false
  })
  
  var tabs = new dijit.layout.TabContainer({
     region:"center"
     , content:"Service Details"
     , tabStrip: true
  }).placeAt(tp.containerNode);
  </code></pre>
  
  <p>But when the open property is set to true, the tab container appears.</p>
  
  <pre><code>var tp = new dijit.TitlePane({
     title: "Title Pane"
     , content: ""
     , open: true
  })
  
  var tabs = new dijit.layout.TabContainer({
     region:"center"
     , content:"Service Details"
     , tabStrip: true
  }).placeAt(tp.containerNode);
  </code></pre>
  
  <p>How can I add widgets to a TitlePane when the open property set to false?</p>