WellCommerce\Bundle\DoctrineBundle\Manager\ManagerInterface::createResource PHP Method

    public function createResource(EntityInterface $resource, bool $flush = true);

 public function upload(UploadedFile $file, $dir) : MediaInterface
 {
     if (!$file->isValid()) {
         throw new InvalidMediaException('Passed file object is not valid');
     }
     /** @var MediaInterface $media */
     $media = $this->manager->initResource();
     $media->setName($file->getClientOriginalName());
     $media->setExtension($file->guessClientExtension());
     $media->setMime($file->getClientMimeType());
     $media->setSize($file->getClientSize());
     $errors = $this->validatorHelper->validate($media);
     if (0 !== count($errors)) {
         throw new InvalidMediaException($errors);
     }
     $this->manager->createResource($media);
     $file->move($this->getUploadDir($dir), $media->getPath());
     return $media;
 }