/**
* @return int
*/
public function loadPublisherTheme()
{
$entity = new PublisherTheme();
$entity->setPublisher($this->em->getRepository(Publisher::class)->find(1))->setTitle('Sample Publisher Theme')->setPublic(true)->setCss('.sample-css{}');
$this->em->persist($entity);
$this->em->flush();
return $entity->getId();
}