//0x20 bytes (sizeof)
struct _MI_PAGEFILE_BITMAPS_CACHE_ENTRY
{
    union
    {
        struct _RTL_BALANCED_NODE LengthTreeNode;                           //0x0
        struct _LIST_ENTRY FreeListEntry;                                   //0x0
    };
    struct _RTL_BALANCED_NODE LocationTreeNode;                             //0xc
    ULONG StartingIndex;                                                    //0x18
    ULONG Length;                                                           //0x1c
};