title: How to remove google.visualization.Dashboard
body: <p>I would like to use this example of charts in the dashboard:</p>
  
  <p><a href="https://code.google.com/apis/ajax/playground/?type=visualization#chartrangefilter_control" rel="nofollow">https://code.google.com/apis/ajax/playground/?type=visualization#chartrangefilter_control</a></p>
  
  <p>To initiate and draw I call "drawVisualization()" function, but I need to be able to remove the charts like it was before calling "drawVisualization()", how could I do that? I didn't find any information how to dispose. I tried dashboard.dispose(); but that doesn't work as I need. So how to remove dashboard with its controls?</p>