static bool Visible_cb(IntPtr inst, IntPtr child_model, IntPtr iter) { try { TreeModelFilter __obj = GLib.Object.GetObject(inst, false) as TreeModelFilter; bool __result; __result = __obj.OnVisible(Gtk.TreeModelAdapter.GetObject(child_model, false), Gtk.TreeIter.New(iter)); return(__result); } catch (Exception e) { GLib.ExceptionManager.RaiseUnhandledException(e, true); // NOTREACHED: above call does not return. throw e; } }