title: cornerRadius for UILabel using User Defined Runtime Attributes not working
body: <p>I try to add cornerRadius to UILabel using <code>User Defined Runtime Attributes</code> 
  But it is not working as expected, cornerRadius is not setting and I wonder where I made mistake. I attached screenshot of it,</p>
  
  <p><a href="https://i.stack.imgur.com/L58HR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/L58HR.png" alt="enter image description here"></a></p>
  
  <p>Help me out in solving</p>