title: how to display vAxis in google chart in time format?
body: <p>I would like to create a line chart that show lap times in vertical axis, i.e:</p>
  
  <pre><code>lap1: 1:14.9
  lap2: 1:14.0
  lap3: 1:12.8
  lap4: 1:13.6
  </code></pre>
  
  <p>The customer would like to have a time format (instead of plain numbers) in vertical axis. Is it possible to configure google charts to draw this?</p>