title: Extending components in PrimeNG
body: <p>I would like to extend a component in PrimeNg using Angular 2. I tried a simple example to extend the MultiSelect component and was unsuccessful. I am getting the below error "No provider for DomHandler!" in the browser console. Has anyone tried extending the PrimeNg components. Is it even possible. </p>
  
  <p>The exact exception:&lt;>
  <strong>"﻿EXCEPTION: Error in ./AppComponent class AppComponent - inline template:0:0            caused by: No provider for DomHandler! <br>
  ErrorHandler.handleError    @   error_handler.js:54 <br>
  (anonymous) @   application_ref.js:261 <br>
  ZoneDelegate.invoke @   zone.js:330 <br>
      onInvoke    @   ng_zone.js:273 <br>
      ZoneDelegate.invoke @   zone.js:329 <br>
      Zone.run    @   zone.js:126 <br>
      (anonymous) @   zone.js:679<br>
      ZoneDelegate.invokeTask @   zone.js:363 <br>
      onInvokeTask    @   ng_zone.js:264 <br>
      ZoneDelegate.invokeTask @   zone.js:362 <br>
      Zone.runTask    @   zone.js:166 <br>
      drainMicroTaskQueue @   zone.js:529 "</strong></p>