title: How to create an admin UI left menu with Flutter
body: <p>I'm new to flutter but I have a curiosity. Considering the typical bootstrap admin UI that you can find online and the typical left menu, how would you recreate that with flutter? I'm particularly interested on a left menu that can be resized clicking on a button and on a sub-menu that can appear and disappear.</p>
  <p>An example can be found <a href="https://coreui.io/demo/3.2.0/" rel="nofollow noreferrer">here</a></p>
  <p>Edit:</p>
  <p>I want to be be clear about the effect I'm trying to reproduce as well. If you click the link relative to the example on the left you see a number of menu. For instance, clicking on <code>Base</code> you are going to see a vertical menu appearing and disappearing. I would like to know how to reproduce it as well.</p>
  <p>Thanks</p>
  <p>Thanks</p>