GObject
    ╰── GInitiallyUnowned
        ╰── GtkWidget
            ├── GtkEntry
            │   ╰── GWeatherLocationEntry
            ╰── GtkContainer
                ╰── GtkBin
                    ╰── GtkComboBox
                        ╰── GWeatherTimezoneMenu
    GBoxed
    ├── GWeatherLocation
    ╰── GWeatherTimezone