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