public void snapToPage(final int whichPage) {
		snapToPage(whichPage, TOP, PAGE_SNAP_DURATION_DEFAULT);
	}
Snap pager to the specified page with the default
{@link VerticalPager#PAGE_SNAP_DURATION_DEFAULT} duration.

@param whichPage
           Zero based index of the page.
app/src/main/java/pro/alexzaitsev/freepager/library/view/core/VerticalPager.java