title: Flutter: Access data from JSON file & convert it to Object
body: <p>I've following Json stored inside Assets/JSON/example.json </p>
  
  <pre><code>[
   {"optiontext" : "One", "optionvalue" : "One"},
   {"optiontext" : "Two", "optionvalue" : "Two"},
   {"optiontext" : "Three", "optionvalue" : "Three"}
  ]
  </code></pre>
  
  <p>I want to read JSON from this file &amp; convert it to MyObject. 
  Have to use it in Flutter App</p>