https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Menu%21LocalActionManager.php/10
LocalActionManager.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Menu%21LocalActionManager.php/property/LocalActionManager%3A%3Ainstances/9
LocalActionManager::$instances | Drupal API
instancesdrupalapi