code: @SafeVarargs
  	public static <E> HashSet<E> newHashSet(E... elements) {
  		HashSet<E> set = new HashSet<E>();
  		Collections.addAll(set, elements);
  		return set;
  	}
docs: Creates a <i>mutable</i> {@code HashSet} instance containing the given elements in unspecified order.
  
  @param elements the elements that the set should contain
  @return a new {@code HashSet} containing those elements (minus duplicates)