title: Does SASS support adding !important to all properties in a mixin?
body: <p>I am currently using the <a href="http://compass-style.org" rel="noreferrer">compass framework</a> and all it's helpful CSS3 mixins. I would like to use the <code>border-radius(5px)</code> mixin and have all properties that come from it marked with <code>!important</code></p>
  
  <p>In <a href="http://lesscss.org" rel="noreferrer">LESS</a> it is possible to apply <code>!important</code> to all properties in a mixin by simply specifying it after call</p>
  
  <pre><code>.myMixin(@x) {
      border-radius: @x;
      -moz-border-radius: @x;
  }
  
  .myClass {
    .myMixin(5px) !important;
  }
  </code></pre>
  
  <p>compiles to</p>
  
  <pre><code>.myClass {
      border-radius: 5px !important;
      -moz-border-radius: 5px !important;
  }
  </code></pre>
  
  <p>Is this possible in <a href="http://sass-lang.com/" rel="noreferrer">SASS</a>, or will I have to rewrite the mixins with an important parameter?</p>
  
  <pre><code>@mixin my-border-radius($value, $important: false) {
      border-radius: @value if($important, !important, null);
      ....
  }
  </code></pre>