Interface for self-registering event listeners.
Classes implementing this interface may be registered by name or instance with an SharedEventManager, without an event name. The attach() method will then be called with the current SharedEventManager instance, allowing the class to wire up one or more listeners.
attachShared(\Zend\EventManager\SharedEventManagerInterface $events)
Implementors may add an optional $priority argument; the SharedEventManager implementation will pass this to the aggregate.
detachShared(\Zend\EventManager\SharedEventManagerInterface $events)