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