readAttributeOnOffTransitionTime(completionHandler:)
Declaration
func readAttributeOnOffTransitionTime(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeOnOffTransitionTime() async throws -> NSNumberfunc readAttributeOnOffTransitionTime(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeOnOffTransitionTime() async throws -> NSNumber