server: {
    mandatory: {};
    optional: {
        OnOff: Type<WithFeatures<WithFeatures<OnOff.Cluster, readonly [Lighting]>, readonly ["OffOnly"]>, typeof OnOffServer, OnOffInterface>;
        TemperatureControl: typeof TemperatureControlServer;
        TemperatureMeasurement: typeof TemperatureMeasurementServer;
    };
} = ...

An implementation for each server cluster supported by the endpoint per the Matter specification.