package events // Event marks items that can be sent as events. type Event interface{} // Sink accepts and sends events. type Sink interface { // Write an event to the Sink. If no error is returned, the caller will // assume that all events have been committed to the sink. If an error is // received, the caller may retry sending the event. Write(event Event) error // Close the sink, possibly waiting for pending events to flush. Close() error }