CheckAndMarkBusy
bool CheckAndMarkBusy(bool includeDescendants);
if (!partition->CheckAndMarkBusy(true))
if (!partition->CheckAndMarkBusy(true))
if (!partition->CheckAndMarkBusy(true))
if (!partition->CheckAndMarkBusy(false))
if (partition->IsBusy() || !child->CheckAndMarkBusy(true))
if (!partition->CheckAndMarkBusy(false))
if (!partition->CheckAndMarkBusy(false))
if (!partition->CheckAndMarkBusy(false))