code: public void execute(Bbox worldBounds) {
  		View endView = mapPresenter.getViewPort().asView(worldBounds, ZoomOption.LEVEL_CLOSEST);
  		mapPresenter.getViewPort().registerAnimation(NavigationAnimationFactory.createZoomIn(mapPresenter, endView));
  	}
docs: Effectively zoom to the bounds that the user drew on the map.
  
  @param worldBounds
  The result of the user's dragging on the map, expressed in world space.