Emit an event.

MatchListeners return a list of matching event names replacing * with any char and assuming a namespacing built with dots (.) eg.

NewCallback creates a new Callback to be passed to the emitter.

Off Removes all callbacks from an event.

On registers to an event.

RemoveListeners drop a list of listeners by event name.

BaseEvent contains unspecialized information about what happened.

Event contains information about what happened.

Callback is a function to be invoked when an event happens.