}

    @Override
    public Date getBuildStartTime() {
        return request.getBuildStartTime();
    }

    @Override
    public ModelBuildingRequest setBuildStartTime(Date buildStartTime) {
        request.setBuildStartTime(buildStartTime);

        return this;
    }

    @Override
    public ModelResolver getModelResolver() {
        return request.getModelResolver();
    }

    ProjectBuilderConfiguration setExecutionProperties(Properties executionProperties);

    Date getBuildStartTime();

    ProjectBuilderConfiguration setBuildStartTime(Date buildStartTime);

        setPluginArtifactRepositories(request.getPluginArtifactRepositories());
        setRepositorySession(request.getRepositorySession());
        setLocalRepository(request.getLocalRepository());
        setBuildStartTime(request.getBuildStartTime());
        setProject(request.getProject());
        setResolveDependencies(request.isResolveDependencies());
        setValidationLevel(request.getValidationLevel());

        setInactiveProfileIds(request.getInactiveProfileIds());
        setSystemProperties(request.getSystemProperties());
        setUserProperties(request.getUserProperties());
        setBuildStartTime(request.getBuildStartTime());
        setModelResolver(request.getModelResolver());
        setModelBuildingListener(request.getModelBuildingListener());
        setModelCache(request.getModelCache());
    }

        return this;
    }

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

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

    Date getBuildStartTime();

    /**
     * Sets the start time of the build.
     *
     * @param buildStartTime The start time of the build, may be {@code null}.
     */
    @Deprecated
    void setBuildStartTime(Date buildStartTime);

    /**
     * Gets the start time of the build.
     *
     * @return The start time of the build or {@code null} if unknown.
     */
    Instant getBuildStartInstant();

        request.setValidationLevel(ModelBuildingRequest.VALIDATION_LEVEL_MAVEN_2_0);
        request.setResolveDependencies(false);

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

     * Sets the start time of the build.
     *
     * @param buildStartTime The start time of the build, may be {@code null}.
     * @return This request, never {@code null}.
     */
    ModelBuildingRequest setBuildStartTime(Date buildStartTime);

    /**
     * Gets the model resolver to use for resolution of mixins or parents that are not locally reachable from the
     * project directory.
     *