public void IsSupersetOf_NullOther_ArgumentNullException()
 => Assert.Catch <ArgumentNullException>(() => _filledIntSet.IsSupersetOf(null));
        public bool IsSupersetOf_IntValues_CorrectResult(int[] subset, int[] set)
        {
            AddValues(subset);

            return(_intSet.IsSupersetOf(set));
        }