title: Listing values of unknown enum
body: <p>Say we have a <code>Class</code> object. Name it <code>cls</code>.</p>
  
  <p>Now <code>cls.isEnum()</code> returns <code>true</code></p>
  
  <p>What a joy!!! Could I please have the values listed to me? (one sugar, no milk)</p>