diff -r 38a48b756d80 -r ab3125bd8b5f ui/server/widget.c
--- a/ui/server/widget.c	Fri Dec 12 11:38:47 2025 +0100
+++ b/ui/server/widget.c	Fri Dec 12 12:00:34 2025 +0100
@@ -26,7 +26,20 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <stdio.h>
+
 #include "widget.h"
+#include "toolkit.h"
+
+void ui_serialize_type_obj_id(UiWidget *w, CxBuffer *buf) {
+    cxBufferPutString(buf, "\"type\":\"");
+    cxBufferPutString(buf, w->type.ptr);
+    cxBufferPutString(buf, "\",\"obj\":\"");
+    cxBufferPutString(buf, w->obj->id.ptr);
+    cxBufferPutString(buf, "\",\"id\":\"");
+    cxBufferPutString(buf, w->id.ptr);
+    cxBufferPutString(buf, "\"");
+}
 
 
 void ui_set_enabled(UIWIDGET widget, int enabled) {