internal static int CountLiveByBits(ref World.StateAllocator alloc)
        {
            int live = 0;

            for (int i = 0; i < 64; ++i)
            {
                live += math.countbits(~alloc.m_Level1[i].FreeBits);
            }

            return(live);
        }
        internal static int CountLiveByPointer(ref World.StateAllocator alloc)
        {
            int live = 0;

            for (int i = 0; i < 64; ++i)
            {
                for (int s = 0; s < 64; ++s)
                {
                    live += alloc.m_Level1[i].SystemPointer[s] != 0 ? 1 : 0;
                }
            }

            return(live);
        }
 internal static void SanityCheck(ref World.StateAllocator alloc)
 {
 }