return false
	}

	writer.writer.(http.Flusher).Flush()
	return true
}

func (writer *messageWriter) start() {
	keepAliveTicker := time.NewTicker(1 * time.Second)
	var progressTicker *time.Ticker
	var progressTickerC <-chan time.Time
	if writer.getProgressFunc != nil {
		progressTicker = time.NewTicker(1 * time.Minute)
		progressTickerC = progressTicker.C
	}