title: Material UI Sticky AppBar below the other AppBar
body: <p>I would like to know how to make an AppBar sticky below the other AppBar?
  when I set position=&quot;sticky&quot;, it will overlay the top AppBar, maybe I need to set something like top: &quot;myTopAppBar px&quot;? but how?</p>
  <p><a href="https://codesandbox.io/s/affectionate-swartz-l5fom" rel="nofollow noreferrer">demo code</a>
  <a href="https://i.stack.imgur.com/S7y4t.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S7y4t.png" alt="enter image description here" /></a></p>