public static void RegisterTo(IVirtualMachine vm)
        {
            var pairs = vm.FindLoopPairs();

            vm.RegisterCommand('[', b =>
            {
                if (b.GetCell() == 0)
                {
                    b.InstructionPointer = pairs[b.InstructionPointer];
                }
            });
            vm.RegisterCommand(']', b =>
            {
                if (b.GetCell() != 0)
                {
                    b.InstructionPointer = pairs[b.InstructionPointer];
                }
            });
        }