pub unsafe extern "C" fn rocksdb_transactiondb_open_column_families(
options: *const rocksdb_options_t,
txn_db_options: *const rocksdb_transactiondb_options_t,
name: *const c_char,
num_column_families: c_int,
column_family_names: *const *const c_char,
column_family_options: *const *const rocksdb_options_t,
column_family_handles: *mut *mut rocksdb_column_family_handle_t,
errptr: *mut *mut c_char,
) -> *mut rocksdb_transactiondb_t