events

type Event struct {
	Message string
	Error   bool
	// contains filtered or unexported fields
}

type Group struct{}

type Log interface {
	Printf(format string, v ...interface{})
	Errorf(format string, v ...interface{})
	// Finish should be called in a defer, right after FromContext.
	Finish()
}

type Sink interface {
	// StartGroup is called when a new group is created. The Context should only
	// be used for the duration of the StartGroup call.
	StartGroup(ctx context.Context, group string) error
	// Topic notifies the Sink that a topic has been started. The same topic may
	// be passed multiple times.
	Topic(string)
	// Event is called once per event, some time between StartGroup and
	// FinishGroup.
	Event(group, topic string, ev Event) error
	// FinishGroup is called when the group is finished. The Context may be
	// canceled when this method is called.
	FinishGroup(ctx context.Context, group string) error
}