title: How to animate a path in flutter?
body: <p>I'd like to achieve the path animation effect as seen over here : </p>
  
  <p><a href="https://cdn-images-1.medium.com/max/800/1*OH8yRHjfJhBvRxLlUAqT4Q.gif" rel="noreferrer">This animation (I couldn't include it because the gif is too big)</a></p>
  
  <p>I only want to achieve the path on the map animation, I know I need to use a stacked, place my map, then use a Painter to paint such path, but how can I animate it ?</p>