readAttributeNullableOctetString(withAttributeCache:endpoint:queue:completionHandler:)

Declaration

class func readAttributeNullableOctetString(withAttributeCache attributeCacheContainer: MTRAttributeCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t, completionHandler: @escaping  @Sendable (Data?, (any Error)?) -> Void)

class func readAttributeNullableOctetString(withAttributeCache attributeCacheContainer: MTRAttributeCacheContainer, endpoint: NSNumber, queue: dispatch_queue_t) async throws -> Data