title: Google Sankey Color Hover
body: <p>Using this API:
  <a href="https://developers.google.com/chart/interactive/docs/gallery/sankey" rel="nofollow">https://developers.google.com/chart/interactive/docs/gallery/sankey</a></p>
  
  <p>I am wanting to make a Sankey diagram. Is there any way to change the color of the links when the mouse is hovering over them without affecting the other links? So, by default they would be gray and then when a link is being hovered over by the mouse, that individual link would turn blue and the others would stay gray?</p>