Min version	8.1	10 Pre RTM
Max version	8.1 Update 1	10 TH2
x64 offset offset:bitpos	Field Name
0x0000	void * BackendCtx
0x0008	struct _HEAP_LFH_CALLBACKS Callbacks	struct _HEAP_SUBALLOCATOR_CALLBACKS Callbacks
0x0028	struct _HEAP_LFH_BUCKET[129] Buckets
0x0030		struct _RTL_SRWLOCK SubsegmentCreationLock
0x0038		uint8_t MaxAffinity
0x0040		const uint8_t * AffinityModArray
0x0050		struct _HEAP_LFH_SUBSEGMENT_CACHE SubsegmentCache
0x00C0		struct _HEAP_LFH_BUCKET *[129] Buckets
0x2878	struct _HEAP_LFH_AFFINITY_SLOT[129] AffinitySlots