Mention gtk_widget_is_toplevel in the migration guide

diff --git a/docs/reference/gtk/migrating-3to4.xml b/docs/reference/gtk/migrating-3to4.xml
index 1db310271aad28ba219a8679f8c3b37f37011eeb..73f7a659b912c02fde69c824038710d903fa33c2 100644 (file)
--- a/docs/reference/gtk/migrating-3to4.xml
+++ b/docs/reference/gtk/migrating-3to4.xml
@@ -772,6 +772,14 @@
         gtk_widget_get_native() instead.
       </para>
     </section>
+
+    <section>
+      <title>gtk_widget_is_toplevel has been removed</title>
+      <para>
+        gtk_widget_is_toplevel() has been removed.
+        Use GTK_IS_ROOT, GTK_IS_NATIVE or GTK_IS_WINDOW
+        instead, as appropriate.
+      </para>
   </section>
 
 </chapter>