- o -

• OFF : Elgg\Logger
• OPTION_DEPRECATION_MESSAGE : Elgg\EventsService
• OPTION_DEPRECATION_VERSION : Elgg\EventsService
• OPTION_STOPPABLE : Elgg\EventsService
• ORIGIN_INSTANT : Elgg\Notifications\Notification
• ORIGIN_SUBSCRIPTIONS : Elgg\Notifications\Notification
• OUTPUT_KEY : Elgg\ViewsService