title: Draw a route in Flutter with google_maps_flutter package
body: <p>I have a map already drawn with <code>google_maps_flutter</code> and I have 2 markers on it. I would like to draw a route between them. Can anybody help me?</p>
  
  <p>When I use the one suggested by <a href="https://stackoverflow.com/users/6618622/copsonroad">@CopsOnRoad</a>, I have the picture displayed. I would like the route to be the blue line, which goes the best way forward.</p>
  
  <p><a href="https://i.stack.imgur.com/Gi4fz.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gi4fz.jpg" alt="Figure that demonstrates the problem"></a></p>