title: How do I set a different theme for a Spinner's dropdown?
body: <p>An example usage:</p>
  
  <p><a href="https://i.stack.imgur.com/wNEvY.png"><img src="https://i.stack.imgur.com/wNEvY.png" alt="enter image description here"></a></p>
  
  <p>The Spinner is dark themed, but I want the dropdown to be light themed.</p>