BeforeOrAfter

class \Drupal\Core\Hook\OrderOperation\OrderOperation
- class \Drupal\Core\Hook\OrderOperation\BeforeOrAfter implements \Drupal\Core\Hook\OrderOperation\OrderOperation
- class \Drupal\Core\Hook\OrderOperation\FirstOrLast implements \Drupal\Core\Hook\OrderOperation\OrderOperation

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.