Base class for events that can be subscribed to via the hook system.
Only events extending this class are dispatched to HookRegistry callbacks.
All current events extend this class. StreamEvent exists as the base for
potential future stream-only events that should not be hookable.
Base class for events that can be subscribed to via the hook system. Only events extending this class are dispatched to HookRegistry callbacks. All current events extend this class. StreamEvent exists as the base for potential future stream-only events that should not be hookable.