title: Angular material multiple items drag drop
body: <p>I'm using angular material for dragging an item from one list to other.</p>
  <p>Attaching the code: <a href="https://stackblitz.com/angular/mdgkpprxjej?file=src%2Fapp%2Fcdk-drag-drop-connected-sorting-group-example.ts" rel="nofollow noreferrer">https://stackblitz.com/angular/mdgkpprxjej?file=src%2Fapp%2Fcdk-drag-drop-connected-sorting-group-example.ts</a>.</p>
  <p>My issue is that I'm able to move only a single item across the lists. Is there some way to select and drag multiple items?</p>