--- a/ui/cocoa/toolkit.h	Sun Oct 19 10:10:06 2025 +0200
+++ b/ui/cocoa/toolkit.h	Sun Oct 19 12:08:32 2025 +0200
@@ -44,6 +44,13 @@
 
 @end
 
+@protocol UiToplevelObject
+
+- (BOOL) getIsVisible;
+- (void) setVisible:(BOOL)visible;
+
+@end
+
 void ui_cocoa_onstartup(void);
 void ui_cocoa_onopen(const char *file);
 void ui_cocoa_onexit(void);