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