public function load(ObjectManager $manager)
{
$projectPart1 = new ProjectPart();
$projectPart1->setPart($this->getReference('part.1'));
$projectPart1->setQuantity(1);
$projectPart2 = new ProjectPart();
$projectPart2->setPart($this->getReference('part.2'));
$projectPart2->setQuantity(1);
$project = new Project();
$project->setName('FOOBAR');
$project->setDescription('none');
$project->addPart($projectPart1);
$project->addPart($projectPart2);
$manager->persist($project);
$manager->persist($projectPart1);
$manager->persist($projectPart2);
$manager->flush();
$this->addReference('project', $project);
$this->addReference('projectpart.1', $projectPart1);
$this->addReference('projectpart.2', $projectPart2);
}