title: How to set default value for drop-down multiselect in angular 2 and ngprime
body: <p>I am following <a href="https://www.primefaces.org/primeng/#/multiselect" rel="noreferrer">PrimeNg Example </a>.and here is a <a href="https://plnkr.co/edit/bgdiVvNG94AthFtX8bSn?p=preview" rel="noreferrer">Plunker</a>.How can I make some values pre selected in the drop down.</p>
  
  <pre><code>  &lt;p-multiSelect [options]="cities" [(ngModel)]="selectedCities"&gt;&lt;/p-multiSelect&gt;
  </code></pre>