How to add radiobuttons in primary menu?

[bazylevnik0]

For example in this menu:

This app was created in Gnome Builder, and template app has a basic menu. But how to improve it? It is not just classic code of XML(with child, objects), not understand how to attach radiobuttons, or something, only what I tried sucesfully - just label with action.

Maybe, what I must to know/read?

[bazylevnik0]

*after asking found this:

<menu id="primary-menu">
    <section>
      <attribute translatable="yes" name="label">Temperature Unit</attribute>
      <item>
        <attribute translatable="yes" name="label">_Celsius</attribute>
        <attribute name="action">app.temperature-unit</attribute>
        <attribute name="target">centigrade</attribute>
      </item>
      <item>
        <attribute translatable="yes" name="label">_Fahrenheit</attribute>
        <attribute name="action">app.temperature-unit</attribute>
        <attribute name="target">fahrenheit</attribute>
      </item>
    </section>
    <section>
      <item>
        <attribute name="action">win.about</attribute>
        <attribute name="label" translatable="yes">_About Weather</attribute>
      </item>
    </section>

With js:

function resolveDefaultTemperatureUnit(unit) {
            unit = GWeather.TemperatureUnit.to_real(unit);
            if (unit == GWeather.TemperatureUnit.CENTIGRADE)
                return new GLib.Variant('s', 'centigrade');
            else if (unit == GWeather.TemperatureUnit.FAHRENHEIT)
                return new GLib.Variant('s', 'fahrenheit');
            else
                return new GLib.Variant('s', 'default');
        }
        let temperatureAction = new Gio.SimpleAction({
            enabled: true,
            name: 'temperature-unit',
            state: resolveDefaultTemperatureUnit(gwSettings.get_enum('temperature-unit')),
            parameter_type: new GLib.VariantType('s')
        });
        temperatureAction.connect('activate', function (_, parameter) {
            gwSettings.set_value('temperature-unit', parameter);
            if (legacyGwSettings) {
                legacyGwSettings.set_value('temperature-unit', parameter);
            }
        });
        gwSettings.connect('changed::temperature-unit', function () {
            temperatureAction.state = resolveDefaultTemperatureUnit(gwSettings.get_enum('temperature-unit'));
        });
        this.add_action(temperatureAction);

From this app:

GNOME / Weather · GitLab