docs: @SafeVarargs
  	public static <T> List<T> sortPageAll(int pageNo, int pageSize, Comparator<T> comparator, Collection<T>... colls) {
  		final List<T> list = new ArrayList<>(pageNo * pageSize);
  		for (Collection<T> coll : colls) {
  			list.addAll(coll);
  		}
  		if (null != comparator) {
  			Collections.sort(list, comparator);
  		}
  
  		return page(pageNo, pageSize, list);
  	}