Expanded class hierarchy of OverrideUserMailRequired in Administer Users by Role 8.2
- class \Drupal\user\Plugin\Validation\Constraint\UserMailRequired extends \Symfony\Component\Validator\Constraint
- class \Drupal\administerusersbyrole\Constraint\OverrideUserMailRequired
- class \Drupal\administerusersbyrole\Constraint\OverrideUserMailRequired