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