server: {
    mandatory: {
        Identify: typeof IdentifyServer;
        OnOff: typeof OnOffServer;
        PumpConfigurationAndControl: typeof PumpConfigurationAndControlServer;
    };
    optional: {
        FlowMeasurement: typeof FlowMeasurementServer;
        Groups: typeof GroupsServer;
        LevelControl: typeof LevelControlServer;
        PressureMeasurement: typeof PressureMeasurementServer;
        ScenesManagement: typeof ScenesManagementServer;
        TemperatureMeasurement: typeof TemperatureMeasurementServer;
    };
} = ...

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