test.php

<?php

use Blackprism\Nothing\HydratorCallable;

public function executeSomeQuery() 
{
	$this->createQueryBuilder()
		->select('id', 'name', 'last_updated')
		->from('user');
	
	return array_map($queryBuilder->execute(), function($row) {
		return new User(
			$row['id'], 
			'prefixed ' . $row['name'], 
			new \DateTime($row['last_updated'])
		);
	});
}


foreach (executeSomeQuery() as $userId => $user) {
    print_r($user);
}