title: How to draw routes between source and destination using Google Map in Flutter?
body: <p>I recently started working on Flutter and started to build an app but now I was hoping to integrate google maps. I started to look more into <code>google_maps_flutter</code> and started to build the map but one thing I'm currently being unable to integrate is to draw the shortest route between a provided source and a destination.</p>
  
  <p>I have looked into <code>google_maps_flutter</code> plugin but unable to find the implementation of the aforementioned functionality.</p>
  
  <p>Any help will be appreciated. </p>