Create a KRRegion. If ParentAllocator is not NullAllocator, KRRegion's destructor will call parent.deallocate.
Block of memory to serve as support for the allocator. Memory must be larger than two words and word-aligned.
See Implementation
Create a KRRegion. If ParentAllocator is not NullAllocator, KRRegion's destructor will call parent.deallocate.