Matter · IOS API REFERENCE

MTRBaseClusterPM1ConcentrationMeasurement

class · iOS 17.6+ · SDK 27.1

class MTRBaseClusterPM1ConcentrationMeasurement

Members (49)

static · iOS 17.6+

readAttributeAcceptedCommandList

TypeScript

static readAttributeAcceptedCommandListWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeAcceptedCommandList(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> [Any]

static · iOS 17.6+

readAttributeAttributeList

TypeScript

static readAttributeAttributeListWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeAttributeList(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> [Any]

static · iOS 17.6+

readAttributeAverageMeasuredValueWindow

TypeScript

static readAttributeAverageMeasuredValueWindowWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeAverageMeasuredValueWindow(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeAverageMeasuredValue

TypeScript

static readAttributeAverageMeasuredValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeAverageMeasuredValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeClusterRevision

TypeScript

static readAttributeClusterRevisionWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeClusterRevision(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeFeatureMap

TypeScript

static readAttributeFeatureMapWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeFeatureMap(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeGeneratedCommandList

TypeScript

static readAttributeGeneratedCommandListWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeGeneratedCommandList(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> [Any]

static · iOS 17.6+

readAttributeLevelValue

TypeScript

static readAttributeLevelValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeLevelValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeMaxMeasuredValue

TypeScript

static readAttributeMaxMeasuredValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeMaxMeasuredValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeMeasuredValue

TypeScript

static readAttributeMeasuredValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeMeasuredValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeMeasurementMedium

TypeScript

static readAttributeMeasurementMediumWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeMeasurementMedium(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeMeasurementUnit

TypeScript

static readAttributeMeasurementUnitWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeMeasurementUnit(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeMinMeasuredValue

TypeScript

static readAttributeMinMeasuredValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeMinMeasuredValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributePeakMeasuredValueWindow

TypeScript

static readAttributePeakMeasuredValueWindowWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributePeakMeasuredValueWindow(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributePeakMeasuredValue

TypeScript

static readAttributePeakMeasuredValueWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributePeakMeasuredValue(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

static · iOS 17.6+

readAttributeUncertainty

TypeScript

static readAttributeUncertaintyWithClusterStateCacheEndpointQueueCompletion(clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue, completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

class func readAttributeUncertainty(withClusterStateCache clusterStateCacheContainer: MTRClusterStateCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> NSNumber

init · iOS 17.6+

init

TypeScript

static init(device: MTRBaseDevice, endpointID: _Foundation_NSNumber, queue: _Dispatch_DispatchQueue): (MTRBaseClusterPM1ConcentrationMeasurement) | null

Swift declaration

init?(device: MTRBaseDevice, endpointID: NSNumber, queue: dispatch_queue_t)

method · iOS 17.6+

readAttributeAcceptedCommandList

TypeScript

readAttributeAcceptedCommandListCompletion(completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeAcceptedCommandList() async throws -> [Any]

method · iOS 17.6+

readAttributeAttributeList

TypeScript

readAttributeAttributeListCompletion(completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeAttributeList() async throws -> [Any]

method · iOS 17.6+

readAttributeAverageMeasuredValueWindow

TypeScript

readAttributeAverageMeasuredValueWindowCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeAverageMeasuredValueWindow() async throws -> NSNumber

method · iOS 17.6+

readAttributeAverageMeasuredValue

TypeScript

readAttributeAverageMeasuredValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeAverageMeasuredValue() async throws -> NSNumber

method · iOS 17.6+

readAttributeClusterRevision

TypeScript

readAttributeClusterRevisionCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeClusterRevision() async throws -> NSNumber

method · iOS 17.6+

readAttributeFeatureMap

TypeScript

readAttributeFeatureMapCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeFeatureMap() async throws -> NSNumber

method · iOS 17.6+

readAttributeGeneratedCommandList

TypeScript

readAttributeGeneratedCommandListCompletion(completion: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeGeneratedCommandList() async throws -> [Any]

method · iOS 17.6+

readAttributeLevelValue

TypeScript

readAttributeLevelValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeLevelValue() async throws -> NSNumber

method · iOS 17.6+

readAttributeMaxMeasuredValue

TypeScript

readAttributeMaxMeasuredValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeMaxMeasuredValue() async throws -> NSNumber

method · iOS 17.6+

readAttributeMeasuredValue

TypeScript

readAttributeMeasuredValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeMeasuredValue() async throws -> NSNumber

method · iOS 17.6+

readAttributeMeasurementMedium

TypeScript

readAttributeMeasurementMediumCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeMeasurementMedium() async throws -> NSNumber

method · iOS 17.6+

readAttributeMeasurementUnit

TypeScript

readAttributeMeasurementUnitCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeMeasurementUnit() async throws -> NSNumber

method · iOS 17.6+

readAttributeMinMeasuredValue

TypeScript

readAttributeMinMeasuredValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeMinMeasuredValue() async throws -> NSNumber

method · iOS 17.6+

readAttributePeakMeasuredValueWindow

TypeScript

readAttributePeakMeasuredValueWindowCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributePeakMeasuredValueWindow() async throws -> NSNumber

method · iOS 17.6+

readAttributePeakMeasuredValue

TypeScript

readAttributePeakMeasuredValueCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributePeakMeasuredValue() async throws -> NSNumber

method · iOS 17.6+

readAttributeUncertainty

TypeScript

readAttributeUncertaintyCompletion(completion: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func readAttributeUncertainty() async throws -> NSNumber

method · iOS 17.6+

subscribeAttributeAcceptedCommandList

TypeScript

subscribeAttributeAcceptedCommandList(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeAcceptedCommandList(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping ([Any]?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeAttributeList

TypeScript

subscribeAttributeAttributeList(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeAttributeList(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping ([Any]?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeAverageMeasuredValueWindow

TypeScript

subscribeAttributeAverageMeasuredValueWindow(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeAverageMeasuredValueWindow(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeAverageMeasuredValue

TypeScript

subscribeAttributeAverageMeasuredValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeAverageMeasuredValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeClusterRevision

TypeScript

subscribeAttributeClusterRevision(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeClusterRevision(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeFeatureMap

TypeScript

subscribeAttributeFeatureMap(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeFeatureMap(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeGeneratedCommandList

TypeScript

subscribeAttributeGeneratedCommandList(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (Array<unknown>) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeGeneratedCommandList(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping ([Any]?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeLevelValue

TypeScript

subscribeAttributeLevelValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeLevelValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeMaxMeasuredValue

TypeScript

subscribeAttributeMaxMeasuredValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeMaxMeasuredValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeMeasuredValue

TypeScript

subscribeAttributeMeasuredValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeMeasuredValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeMeasurementMedium

TypeScript

subscribeAttributeMeasurementMedium(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeMeasurementMedium(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeMeasurementUnit

TypeScript

subscribeAttributeMeasurementUnit(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeMeasurementUnit(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeMinMeasuredValue

TypeScript

subscribeAttributeMinMeasuredValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeMinMeasuredValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributePeakMeasuredValueWindow

TypeScript

subscribeAttributePeakMeasuredValueWindow(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributePeakMeasuredValueWindow(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributePeakMeasuredValue

TypeScript

subscribeAttributePeakMeasuredValue(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributePeakMeasuredValue(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

method · iOS 17.6+

subscribeAttributeUncertainty

TypeScript

subscribeAttributeUncertainty(params: MTRSubscribeParams, subscriptionEstablished: ((() => void)) | null, reportHandler: ((arg0: (_Foundation_NSNumber) | null, arg1: (NativeError) | null) => void)): void

Swift declaration

func subscribeAttributeUncertainty(with params: MTRSubscribeParams, subscriptionEstablished: MTRSubscriptionEstablishedHandler?, reportHandler: @escaping (NSNumber?, (any Error)?) -> Void)

Skipped declarations

1 declarations were excluded from these bindings. Each reason comes from the generator or the iOS SDK compiler.

MTRBaseClusterPM1ConcentrationMeasurement.init()

inherited init: cannot prove legal (class declares 1 custom initializer)

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