public File::setPermanent() Sets the file

public File::getOwnerId() Returns the entity

Defines the file entity class. Plugin annotation @ContentEntityType(

public File::setOwner(UserInterface $account) Sets

public File::getOwner() Returns the entity

public File::preSave(EntityStorageInterface $storage)

public static File::baseFieldDefinitions(EntityTypeInterface $entity_type)

public File::setSize($size) Sets the size

public File::setTemporary() Sets the file

public File::isPermanent() Returns TRUE