code: public static <T> Collection<? super T> addAll(Collection<? super T> c, T... elements)
  	{
  		java.util.Collections.addAll(c,elements);
  		return c;
  	}
docs: Add elements to a collection and return the collection.
  This only differs from
  {@link java.util.Collections#addAll(Collection,Object[])}
  in that it returns the collection instead of a boolean.
  @param c The collection to add to.
  @param elements The elements to add.
  @return c
  @see java.util.Collections#addAll(Collection,Object[])