title: How to hide bar labels from Google Chart Timeline
body: <p>I'm trying to remove labels(c1,c2,c3,c4) from my bars.</p>
  
  <p>I tried styling with: 
  <code>timeline: {barLabelStyle: ...}</code> 
  but nothing works for me (I thought about set font color to color of bar, but docs says ,,You can't set the color of barLabel text."</p>
  
  <p>jsfiddle: <a href="https://jsfiddle.net/550wb2t0/1/" rel="nofollow">https://jsfiddle.net/550wb2t0/1/</a></p>