title: In SASS, is there a way to declare refer to the subclass of the block's parent?
body: <p>I am looking for a way to refer to a certain subclass of the parent of the block i am currently writing declarations in.</p>
  <p>Let me illustrate.</p>
  <p><strong>Instead of:</strong></p>
  <pre><code>.label {
      @extend .not-selectable;
      display: inline-block;
      line-height: 22px;
  }
  </code></pre>
  <p><strong>And then:</strong></p>
  <pre><code>&amp;.active .label {
      background-color: #eee;
  }
  </code></pre>
  <p><strong>I'd like to write something like:</strong></p>
  <pre><code>.label {
      @extend .not-selectable;
      display: inline-block;
      line-height: 22px;
      &lt;&lt; &amp;.active {
          background-color: #eee;
      }
  }
  </code></pre>
  <p>With the resulting, compiled CSS being exactly the same in both cases.</p>
  <p>Is there any such syntax or hack or trick in SASS to achieve this?</p>