if (logger.isDebugEnabled()) {
            try {
                ManagementFactory.getRuntimeMXBean().getInputArguments().stream().forEach(s -> logger.debug("Parameter: {}", s));
                System.getProperties().entrySet().stream().forEach(e -> logger.debug("Property: {}={}", e.getKey(), e.getValue()));
                System.getenv().entrySet().forEach(e -> logger.debug("Env: {}={}", e.getKey(), e.getValue()));

            if (modelBase != null) {
                visit(modelBase.getModules());
                visit(modelBase.getDistributionManagement());
                visit(modelBase.getProperties());
                visit(modelBase.getDependencyManagement());
                for (Dependency dependency : modelBase.getDependencies()) {
                    visit(dependency);
                }

        projectReferences.put(
                getProjectReferenceId(project.getGroupId(), project.getArtifactId(), project.getVersion()), project);
    }

    public Properties getProperties() {
        return getModel().getProperties();
    }

    public List<String> getFilters() {
        return getBuild().getFilters();
    }

    public Map<String, MavenProject> getProjectReferences() {

    }

    @Override
    public final int invoke(InvokerRequest invokerRequest) {
        requireNonNull(invokerRequest);

        Properties oldProps = new Properties();
        oldProps.putAll(System.getProperties());
        ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
        try (C context = createContext(invokerRequest)) {
            if (contextConsumer != null) {

    assertFalse(result.containsKey("not here"));

    // Test loading system properties
    result = Maps.fromProperties(System.getProperties());
    assertTrue(result.containsKey("java.version"));

    // Test that defaults work, too.
    testProp = new Properties(System.getProperties());
    String override = "test\njava.version : hidden";

    testProp.load(new StringReader(override));

            if (hasExpression(m.getVersion())) {
                Severity versionExpressionSeverity = Severity.ERROR;
                if (Boolean.parseBoolean(
                        m.getProperties().getProperty(BUILD_ALLOW_EXPRESSION_IN_EFFECTIVE_PROJECT_VERSION))) {
                    versionExpressionSeverity = Severity.WARNING;
                }
                addViolation(
                        problems,

        String checkValue = "value";

        Properties properties = new Properties();
        properties.setProperty(key, checkValue);

        Model model = new Model();
        model.setProperties(properties);

        MavenProject project = new MavenProject(model);

        ExpressionEvaluator ee = createExpressionEvaluator(project, null, new Properties());