Expose an event that will be fired when the View layout pass is completed.
Main use case is to be able to use getActualSize() and be sure the values are correct. It is a common thing when you want to trigger animations that are dependent on the size of the views.

A project with a custom implementation of such property can be found here: https://play.nativescript.org/?template=play-ng&id=Ximtcw&v=17&file=slides%2Fpager.component.ts