A notification sent when an item is banned.
A notification sent when the registry is cleaned up.
A notification sent when the registry is flushed.
A notification sent when an item is protected.
A notification sent when an item is registered.
A notification sent when an item is unbanned.
A notification sent when an item is unprotected.
A notification sent when an item is unregistered.
An enumeration of the types of notifications that a registry can send.