IsAllocated
if (node == NULL || node->IsAllocated() == false)
if (found->IsAllocated() == false) {
if (node == NULL || node->IsAllocated() == true)
if (found->IsAllocated() == true) {
if (extent->IsAllocated() == true)
if (node->IsAllocated() == true)
if (IsAllocated() == false && IsData() == false)
else if (IsAllocated() == false && IsData() == true)
else if (IsAllocated() == true && IsData() == true)
bool IsAllocated() const;