title: SASS group parent selector
body: <p>I have this code:</p>
  
  <pre><code>.sibling-class {
      .some-class1 {...}
      .some-class2 {...}
      .some-class3 {...}
      ....
      .some-class1000 {...}
  }
  </code></pre>
  
  <p>And I need:</p>
  
  <pre><code>.sibling-class {
      &amp;.some-class1 {...}
      &amp;.some-class2 {...}
      &amp;.some-class3 {...}
      ....
      &amp;.some-class1000 {...}
  }
  </code></pre>
  
  <p>How can I do it without putting <code>&amp;</code> one thousand times?
  Is there some group syntax for this case?</p>