public void OpInEquality()
        {
            object leftEither  = LeftRightExtensions.AsLeft <int, string>(12);
            object rightEither = LeftRightExtensions.AsRight <int, string>("12");

            // ReSharper disable once ConditionIsAlwaysTrueOrFalse
            (leftEither != rightEither).Should().BeTrue();
        }
        public void GetHashCodeReturnsHashCodeOfLeftValue()
        {
            var leftEither = LeftRightExtensions.AsLeft <int, string>(12);

            leftEither.GetHashCode().Should().Be(12.GetHashCode());
        }