title: Is there a way to add a mixin into a variable in LESS
body: <p>Can I add a mixin to a variable in LESS?</p>
  
  <p>Something like this</p>
  
  <pre><code>@input-border-radius: .rounded();
  or
  @h1: .font-size(46) // This pulls from the rem calculator mixin.
  </code></pre>
  
  <p>Looked at the LESS Docs but can't see a way to do it.</p>