pub unsafe extern "C" fn rocksdb_multi_get_cf(
db: *mut rocksdb_t,
options: *const rocksdb_readoptions_t,
column_families: *const *const rocksdb_column_family_handle_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,
)