[gtk/fix-cursor-hiding: 3/7] treelistmodel: Add some docs

[Matthias Clasen <matthiasc src gnome org>]

commit a05efd7270e6448c5be772c91210cc896b42575f
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Mar 25 13:53:44 2021 -0400

    treelistmodel: Add some docs

 gtk/gtktreelistmodel.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/gtk/gtktreelistmodel.c b/gtk/gtktreelistmodel.c
index 96fe9b4dff..06d92bff29 100644
--- a/gtk/gtktreelistmodel.c
+++ b/gtk/gtktreelistmodel.c
@@ -29,6 +29,14 @@
  * GtkTreeListModel:
  *
  * `GtkTreeListModel` is a list model that can create child models on demand.
+ *
+ * `GtkTreeListModel` is typically used together with `GtkTreeExpander` to
+ * make list widgets where user can expand rows by clicking on an expander.
+ *
+ * When creating `GtkTreeListModel` with [ctor Gtk TreeListModel new], you
+ * specify a *root* model that contains the initial items for your tree, and
+ * a callback function that we be called whenever the tree model needs to
+ * find the children of a given item.
  */
 
 enum {