public void WhenPushingMultipleBracesCountIsIncreased()
        {
            var stack = new UnifiedBraceStacker();

            stack.Push(new CharPos('{', 0));
            stack.Push(new CharPos('(', 0));
            Assert.Equal(2, stack.Count('{'));
        }
        public void WhenEmptyCountIsZero()
        {
            var stack = new UnifiedBraceStacker();

            Assert.Equal(0, stack.Count('{'));
        }