Remove gdk_event_get_user_data from public headers

And add it back in gdk-private.h

gdk/gdk-private.h

@@ -33,4 +33,6 @@ void            gdk_window_move_to_rect         (GdkWindow          *window,
                                                  gint                rect_anchor_dx,
                                                  gint                rect_anchor_dy);
 
+GObject *       gdk_event_get_user_data         (const GdkEvent *event);
+
 #endif /* __GDK__PRIVATE_H__ */

gdk/gdkevents.c

@@ -27,6 +27,7 @@
 #include "gdkinternals.h"
 #include "gdkdisplayprivate.h"
 #include "gdkdndprivate.h"
+#include "gdk-private.h"
 
 #include <string.h>
 #include <math.h>

gdk/gdkevents.h

@@ -1570,8 +1570,6 @@ gboolean       gdk_event_get_pointer_emulated (GdkEvent *event);
 GDK_AVAILABLE_IN_3_92
 void           gdk_event_set_user_data (GdkEvent *event,
                                         GObject  *user_data);
-GDK_AVAILABLE_IN_3_92
-GObject *      gdk_event_get_user_data (const GdkEvent *event);
 
 G_END_DECLS