title: Return variables from mixin with Stylus
body: <p>Is it possible to apply variables to the local scope from a mixin or function? For example:</p>
  
  <pre><code>.hello-world
      get-variables(bar);
      content: $foo;
  </code></pre>
  
  <p>Will output to:</p>
  
  <pre><code>.hello-world
      content: 'bar';
  </code></pre>
  
  <p>Because the get-variables mixin applied a variable named $foo to the local scope.</p>
  
  <p>Is this possible in Stylus? If not, is it possible with Sass?</p>