https://www.php.net/manual/tr/function.mongodb.driver.monitoring.addsubscriber.php
PHP: MongoDB\Driver\Monitoring\addSubscriber - Manual
Registers a monitoring event subscriber globally
driver monitoringphpmongodbmanual
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Component%21EventDispatcher%21ContainerAwareEventDispatcher.php/function/ContainerAwareEventDispatcher%3A%3AaddSubscriber/9
function ContainerAwareEventDispatcher::addSubscriber | Drupal API
functiondrupalapi