Wrong method signature in documentation for subscribing to an event

API page: https://api.drupal.org/api/drupal/core%21core.api.php/group/events/

Problem

The code example in the documentation for subscribing to an event uses the wrong method signature. It needs to be a static method.

Proposed resolution

Change this:

public function getSubscribedEvents()

To this:

public static function getSubscribedEvents()