title: Flutter how to add a Expandable menu item inside navigation drawer?
body: <p>I want to add expandable menu to <code>drawer</code> items of flutter. How can I achieve this functionality in flutter. Please just point me in the correct direction if there is any example or blog. </p>
  
  <p><a href="https://i.stack.imgur.com/C4GId.png" rel="noreferrer"><img src="https://i.stack.imgur.com/C4GId.png" alt="enter image description here"></a></p>