https://api.drupal.org/api/drupal/core%21modules%21serialization%21src%21Normalizer%21FieldNormalizer.php/property/FieldNormalizer%3A%3AsupportedInterfaceOrClass/9
FieldNormalizer::$supportedInterfaceOrClass | Drupal API
drupalapi
https://api.drupal.org/api/drupal/core%21modules%21hal%21src%21Normalizer%21EntityReferenceItemNormalizer.php/property/EntityReferenceItemNormalizer%3A%3AsupportedInterfaceOrClass/8.9.x
EntityReferenceItemNormalizer::$supportedInterfaceOrClass | Drupal API
drupalapi