server: {
    mandatory: {
        Identify: typeof IdentifyServer;
        Thermostat: typeof ThermostatServer;
    };
    optional: {
        EnergyPreference: typeof EnergyPreferenceServer;
        Groups: typeof GroupsServer;
        ScenesManagement: typeof ScenesManagementServer;
        ThermostatUserInterfaceConfiguration: typeof ThermostatUserInterfaceConfigurationServer;
        TimeSynchronization: typeof TimeSynchronizationServer;
    };
} = ...

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