return this;
    }

    @Override
    public SettingsSource getUserSettingsSource() {
        return userSettingsSource;
    }

    @Override
    public DefaultSettingsBuildingRequest setUserSettingsSource(SettingsSource userSettingsSource) {
        this.userSettingsSource = userSettingsSource;

        return this;
    }

    @Override
    public Properties getSystemProperties() {

     *
     * @param userSettingsSource The user settings source, may be {@code null} to disable user settings.
     * @return This request, never {@code null}.
     */
    SettingsBuildingRequest setUserSettingsSource(SettingsSource userSettingsSource);

    /**
     * Gets the system properties to use for interpolation. The system properties are collected from the runtime