title: How to refer special Hibernate property "class" in QueryDSL?
body: <p>Hibernate has a special "class" property. How to refer it in QueryDSL?</p>
  
  <p>What I generally need is to group results by the entity type. <a href="https://stackoverflow.com/a/3118623/289827">It is possible to do it in HQL.</a></p>