title: Google Charts (Geochart) toggle region between World and Europe
body: <p>is there a way to set a toggle option on the chart to switch the region between <code>World</code> and <code>Europe</code></p>
  
  <p>I googled like crazy and cant find anything. I know how to set the region just not toggle it.</p>
  
  <p>Thanks
  C</p>