}

    private MutableGradleProperties loadProperties(File rootDir) {
        Map<String, Object> defaultProperties = new HashMap<>();
        Map<String, Object> overrideProperties = new HashMap<>();

        addGradlePropertiesFrom(startParameter.getGradleHomeDir(), defaultProperties);
        addGradlePropertiesFrom(rootDir, defaultProperties);
        addGradlePropertiesFrom(startParameter.getGradleUserHomeDir(), overrideProperties);

    private final Map<String, Object> defaultProperties;
    private final Map<String, Object> overrideProperties;
    private final Map<String, Object> gradleProperties;

    public DefaultGradleProperties(
        Map<String, Object> defaultProperties,
        Map<String, Object> overrideProperties
    ) {
        this.defaultProperties = defaultProperties;
        this.overrideProperties = overrideProperties;

        else -> null
    }

    override fun getSystemProperties(): Environment.Properties =
        DefaultProperties(System.getProperties().uncheckedCast())

    override fun getVariables(): Environment.Properties =
        DefaultProperties(System.getenv())

    internal
    open class DefaultProperties(val map: Map<String, String>) : Environment.Properties {