title: Multiple types of bulleted list in sublists in beamer
body: <p>I tried to create a different bullets for sublists in beamer but everytime it creates the same bullet for nested lists as shown below. I tried <code>label=\roman*</code> but it is for enumitem. How do I change sublits bullets to something like arrow or rectangle?</p>
  <p><a href="https://i.stack.imgur.com/79iOA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/79iOA.png" alt="enter image description here" /></a></p>