extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
extern boolean_t space_map_contains(space_map_t *sm,
uint64_t start, uint64_t size);
extern void space_map_remove(space_map_t *sm, uint64_t start, uint64_t size);
extern boolean_t space_map_contains(space_map_t *sm,
uint64_t start, uint64_t size);