title: VS Code: Pug autocomplete class names
body: <p>I searched the web today to find the answer, but I couldn't find any solution to this problem. </p>
  
  <p>I use BEM in all of my dev projects, so I deal with class names pretty often and their names repeat a lot. In Atom when I wrote Pug code it would suggest to me an already used class name in this document. It was very useful and simple feature. </p>
  
  <p>I moved to VS Code not so long ago, but I couldn't find solution to make this work. Is there any extension or other way to make this work?</p>