ProjectBuilderConfiguration setUserProperties(Properties userProperties);

    ProjectBuilderConfiguration setExecutionProperties(Properties executionProperties);

    Date getBuildStartTime();

    ProjectBuilderConfiguration setBuildStartTime(Date buildStartTime);

    public ProjectBuilderConfiguration setExecutionProperties(Properties executionProperties) {
        this.executionProperties = executionProperties;
        return this;
    }

    @Override
    public Date getBuildStartTime() {
        return buildStartTime;
    }

    @Override
    public ProjectBuilderConfiguration setBuildStartTime(Date buildStartTime) {
        this.buildStartTime = buildStartTime;
        return this;

        request.setResolveDependencies(false);

        request.setLocalRepository(configuration.getLocalRepository());
        request.setBuildStartTime(configuration.getBuildStartTime());
        request.setUserProperties(configuration.getUserProperties());
        request.setSystemProperties(configuration.getExecutionProperties());

        // NOTE: Order counts here!
        valueSources.add(basedirValueSource);
        valueSources.add(baseUriValueSource);
        valueSources.add(new BuildTimestampValueSource(config.getBuildStartTime(), timestampFormat));
        valueSources.add(modelValueSource1);
        valueSources.add(new MapBasedValueSource(config.getUserProperties()));
        valueSources.add(new MapBasedValueSource(modelProperties));