public function initLogo()
{
$collectionType = new CollectionType();
$collectionType->setName('My collection type');
$this->em->persist($collectionType);
$collection = new Collection();
$collection->setType($collectionType);
$this->em->persist($collection);
$imageType = new MediaType();
$imageType->setName('image');
$imageType->setDescription('This is an image');
$this->em->persist($imageType);
$file = new File();
$file->setVersion(1);
$fileVersion = new FileVersion();
$fileVersion->setVersion(1);
$fileVersion->setName('logo.jpeg');
$fileVersion->setMimeType('image/jpg');
$fileVersion->setFile($file);
$fileVersion->setSize(1124214);
$fileVersion->setDownloadCounter(2);
$fileVersion->setChanged(new \DateTime('1937-04-20'));
$fileVersion->setCreated(new \DateTime('1937-04-20'));
$file->addFileVersion($fileVersion);
$this->em->persist($fileVersion);
$this->logo = new Media();
$this->logo->setType($imageType);
$this->logo->setCollection($collection);
$this->logo->addFile($file);
$file->setMedia($this->logo);
$this->em->persist($this->logo);
$this->em->persist($file);
}