{
Gtk::MessageDialog dialog("Feature not available", false, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_CLOSE, true);
dialog.set_secondary_text("Sorry, this feature has not yet been implemented.");
{
Gtk::MessageDialog dialog("Feature not available", false, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_CLOSE, true);
dialog.set_secondary_text("Sorry, this feature has not yet been implemented.");