pub unsafe extern "C" fn rocksdb_multi_get(
    db: *mut rocksdb_t,
    options: *const rocksdb_readoptions_t,
    num_keys: usize,
    keys_list: *const *const c_char,
    keys_list_sizes: *const usize,
    values_list: *mut *mut c_char,
    values_list_sizes: *mut usize,
    errs: *mut *mut c_char
)