title: How to convert a Future in flutter to a Stream
body: <p>I have a function that returns a Future of the type duration.</p>
  
  <pre><code>Future loadur(TimerService timerservice) async {
   var dur = Duration.zero;
   dur = await timerservice.currentDuration();
   return dur;}
  </code></pre>
  
  <p>The future takes duration from a timerservice which updates itself to run a timer.Now i want the future to be converted to a stream so i can show it in a StreamBuilder(Futurebuilder doesn't update the timer).</p>
  
  <p>Any way to convert the future to a stream of duration will be helpful.</p>