val buttons : ([> `messagedialog ], GtkEnums.buttons_type) Gobject.propertyval message_type : ([> `messagedialog ], GtkEnums.message_type) Gobject.propertyval image : ([> `messagedialog ], Gtk.widget Gtk.obj) Gobject.propertyval message_area : ([> `messagedialog ], Gtk.widget Gtk.obj) Gobject.propertyval secondary_text : ([> `messagedialog ], string) Gobject.propertyval secondary_use_markup : ([> `messagedialog ], bool) Gobject.propertyval text : ([> `messagedialog ], string) Gobject.propertyval use_markup : ([> `messagedialog ], bool) Gobject.property