in galog.go [627:635]
func (lg *logger) RegisteredBackendIDs() []string {
lg.queuesMutex.Lock()
defer lg.queuesMutex.Unlock()
var backendIDs []string
for _, queue := range lg.queues {
backendIDs = append(backendIDs, queue.backend.ID())
}
return backendIDs
}