stats, ok := list.targetStats[id]
	if !ok {
		stats = targetStat{}
	}

	stats.currentSendCalls++
	list.targetStats[id] = stats
	return
}

func (list *TargetList) decCurrentSendCalls(id TargetID) {
	list.statLock.Lock()
	defer list.statLock.Unlock()

	stats, ok := list.targetStats[id]
	if !ok {
		// should not happen
		return
	}

	stats.currentSendCalls--