pub unsafe extern "C" fn rocksdb_approximate_memory_usage_create(
consumers: *mut rocksdb_memory_consumers_t,
errptr: *mut *mut c_char,
) -> *mut rocksdb_memory_usage_t
pub unsafe extern "C" fn rocksdb_approximate_memory_usage_create(
consumers: *mut rocksdb_memory_consumers_t,
errptr: *mut *mut c_char,
) -> *mut rocksdb_memory_usage_t