title: How to prefetch data from api for 'ShowModalBottomSheet' even before it being opened in Flutter
body: <p>Hi I'm trying to use <code>ShowModalBottomSheet</code> in my flutter App. But right now how it's being worked is the data which need to be displayed is being fetched only when <code>ShowModalBottomSheet</code> code executed and which creating a delay. </p>
  
  <p>I want to know how do I prefetch the data beforhand using Future so that which can be used instantly when <code>ShowModalBottomSheet</code> triggered. </p>