[gnome-builder/gnome-builder-43] libide/gtk: add missing constructor

[Christian Hergert <chergert src gnome org>]

commit f94a286f3f410acce5287b7ac3235de041e0a47c
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 20 03:17:38 2022 -0700

    libide/gtk: add missing constructor

 src/libide/gtk/ide-tree-expander.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/libide/gtk/ide-tree-expander.c b/src/libide/gtk/ide-tree-expander.c
index 05eb5c920..9bbba1f1b 100644
--- a/src/libide/gtk/ide-tree-expander.c
+++ b/src/libide/gtk/ide-tree-expander.c
@@ -407,6 +407,12 @@ ide_tree_expander_init (IdeTreeExpander *self)
   gtk_widget_add_controller (GTK_WIDGET (self), controller);
 }
 
+GtkWidget *
+ide_tree_expander_new (void)
+{
+  return g_object_new (IDE_TYPE_TREE_EXPANDER, NULL);
+}
+
 /**
  * ide_tree_expander_get_item:
  * @self: a #IdeTreeExpander