title: How to reset layer color in mapbox GL JS client-side?
body: <p>I'm writing a program which is based on Mapbox GL JS. I have saved my layer in mapbox styles and given them some coloring.
  On client side,on click of button I'm changing color of that layer by
  <code>Map.setPaintProperty(layerid,'circle-color','#ff00ff')</code>
  but now I want one more button which will reset the layer color back to original (which I gave in mapbox style).</p>
  
  <p>Any thoughts?</p>