overlaylayout: Add docs for GtkOverlayLayoutChild

diff --git a/gtk/gtkoverlaylayout.c b/gtk/gtkoverlaylayout.c
index 27a95c37641d246558bf16d14d89a403fbeeafee..bc457719d67c4f76e32b2c2a48cb713247946c99 100644 (file)
--- a/gtk/gtkoverlaylayout.c
+++ b/gtk/gtkoverlaylayout.c
@@ -43,6 +43,12 @@
  * properties get documented.
  */
 
+/**
+ * GtkOverlayLayoutChild:
+ *
+ * `GtkLayoutChild` subclass for children in a `GtkOverlayLayout`.
+ */
+
 struct _GtkOverlayLayout
 {
   GtkLayoutManager parent_instance;