#include <gtk/gtk.h>
+/* Left to do:
+ * - Proper coverage checking to see if the unit tests cover
+ * all possible cases.
+ * - Verify if the ref counting is done properly for both the
+ * normal ref_count and the zero_ref_count. One way to test
+ * this area is by collapsing/expanding branches on the view
+ * that is connected to the filter model.
+ * - Check if the iterator stamp is incremented at the correct times.
+ */
+
+
/*
* Model creation
*/