+/**
+ * gtk_tree_view_get_n_columns:
+ * @tree_view: a #GtkTreeView
+ *
+ * Queries the number of columns in the given @tree_view.
+ *
+ * Returns: The number of columns in the @tree_view
+ *
+ * Since: 3.4
+ **/
+guint
+gtk_tree_view_get_n_columns (GtkTreeView *tree_view)
+{
+ g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), 0);
+
+ return tree_view->priv->n_columns;
+}
+