Min version	8.1 Update 1	10 Pre RTM
Max version		10 TH2
x86 offset offset:bitpos	Field Name
0x0000	void * BackendCtx
0x0004	struct _HEAP_LFH_CALLBACKS Callbacks	struct _HEAP_SUBALLOCATOR_CALLBACKS Callbacks
0x0014	struct _HEAP_LFH_BUCKET[129] Buckets
0x0018		struct _RTL_SRWLOCK SubsegmentCreationLock
0x001C		uint8_t MaxAffinity
0x0020		const uint8_t * AffinityModArray
0x0028		struct _HEAP_LFH_SUBSEGMENT_CACHE SubsegmentCache
0x0060		struct _HEAP_LFH_BUCKET *[129] Buckets
0x143C	struct _HEAP_LFH_AFFINITY_SLOT[129] AffinitySlots