fun save(multiMeasurement: Mono<MultiMeasurement>) =
    multiMeasurement.map(MultiMeasurement::validate)
        .flatMapMany { measurementCollector.save(it) }
        .doOnNext { eventSender.sendEvent(it.toMeasurementItem()) }
        .then(statusFacade.save(multiMeasurement))
        .doOnNext { eventSender.sendEvent(it.toStatusUpdateItem()) }
        .flatMap { toSettings(it.deviceId) }

|_  Mono.flatMap ⇢ com.openbrewery.beerbob.status.StatusCollector.save(StatusCollector.kt:15)
|_  Flux.then ⇢ com.openbrewery.beerbob.measurement.MeasurementFacade.save(MeasurementFacade.kt:21)
|_  Mono.doOnNext ⇢ com.openbrewery.beerbob.measurement.MeasurementFacade.save(MeasurementFacade.kt:22)
|_  Mono.flatMap ⇢ com.openbrewery.beerbob.measurement.MeasurementFacade.save(MeasurementFacade.kt:23)