/**
* {@inheritDoc}
*/
public function preSetData(FormEvent $event)
{
$characteristics = $event->getData();
if (!$characteristics instanceof AbstractCharacteristics) {
throw new \InvalidArgumentException(sprintf('Expected AbstractCharacteristics instance, got "%s".', get_class($characteristics)));
}
$schema = $this->manager->getSchemaForClass($characteristics);
$parentCharacteristics = $this->manager->getInheritedCharacteristics($characteristics);
$form = $event->getForm();
$form->add('characteristics', new CharacteristicsCollectionType($this->manager, $this->em, $schema, $parentCharacteristics), ['label' => false, 'by_reference' => false]);
}
