public void instantiate() {
		addView(getViewAt(Constants.TOP_PAGE_INDEX - 1));
		addView(getViewAt(Constants.CENTRAL_PAGE_INDEX - 1));
		addView(getViewAt(Constants.BOTTOM_PAGE_INDEX - 1));
		snapPageWhenLayoutIsReady(Constants.CENTRAL_PAGE_INDEX);
		addOnPageChangedListener(this);
	}
Adding functionality of program page spapping and infinite paging. Call
{@link instaniate()} to initialize.

@author A.Zaitsev
app/src/main/java/pro/alexzaitsev/freepager/library/view/infinite/AbstractInfiniteVerticalPager.java