CheckUnmarked
bool CheckUnmarked(uint32 start, uint32 length);
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));
ASSERT(block.CheckUnmarked(fLargestStart, fLargestLength));