Implements \Symfony\Component\Serializer\Normalizer\NormalizerInterface::supportsNormalization()
Overrides JsonldNormalizerBase::supportsNormalization
public function supportsNormalization($data, $format = NULL) {
// @todo Switch to EntityInterface once all entity types are converted to
// EntityNG.
return parent::supportsNormalization($data, $format) && $data instanceof EntityNG;
}