transactional.md

    public function someMethod(DatabaseAdapter $adapter): Promise
    {
        return call(
            static function() use ($adapter): \Generator
            {
                yield $adapter->transactional(
                    static function(QueryExecutor $queryExecutor): \Generator
                    {
                        yield $queryExecutor->execute('SELECT NOW()');
                    }
                );
            }
        );
    }
    
    ```