docs: Add GtkTreeExpander

We want to link to it from various places, so it needs
to be present in the docs.

diff --git a/docs/reference/gtk/gtk4-sections.txt b/docs/reference/gtk/gtk4-sections.txt
index 564dd410c95669807f21f62500228653e00b8fab..7eaf846fdfee34c09971fecaf8f02093b23cd8f5 100644 (file)
--- a/docs/reference/gtk/gtk4-sections.txt
+++ b/docs/reference/gtk/gtk4-sections.txt
@@ -3420,6 +3420,7 @@ gtk_tree_list_row_get_type
 <SECTION>
 <FILE>gtktreeexpander</FILE>
 <TITLE>GtkTreeExpander</TITLE>
+GtkTreeExpander
 gtk_tree_expander_new
 gtk_tree_expander_get_child
 gtk_tree_expander_set_child