String packaging = model.getPackaging();

        Collection<Plugin> defaultPlugins = lifecycle.getPluginsBoundByDefaultToAllLifecycles(packaging);

        if (defaultPlugins == null) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                    .setMessage("Unknown packaging: " + packaging)

                    + Thread.currentThread().getContextClassLoader());
        }

        LifecycleMapping lifecycleMappingForPackaging = lookupLifecycleMapping(packaging);

        if (lifecycleMappingForPackaging == null) {
            return null;
        }

        Map<Plugin, Plugin> plugins = new LinkedHashMap<>();

<groupId>project.group</groupId>
<artifactId>project-artifact</artifactId>
<version>0.0.0.0</version>
<packaging>type</packaging>
    ]]></configuration>
    <description> This is the Artifact instance created from the essential project
      attributes: groupId, artifactId, version, and packaging (with a default packaging of
      'jar').
    </description>
  </expression>
  <expression>
    <syntax>project.parent</syntax>

                assertEquals(handler.getExtension(), extension, type + " extension");
                // Packaging/Directory is Maven1 remnant!!!
                // assertEquals(handler.getPackaging(), packaging, type + " packaging");
                assertEquals(handler.getClassifier(), classifier, type + " classifier");
                assertEquals(handler.getLanguage(), language, type + " language");

    private final Packaging packaging;

    public DefaultProject(InternalMavenSession session, MavenProject project) {
        this.session = session;
        this.project = project;
        ClassLoader ttcl = Thread.currentThread().getContextClassLoader();
        try {
            Thread.currentThread().setContextClassLoader(project.getClassRealm());

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t04-b</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t06-d</artifactId>
  <packaging>jar</packaging>
  <version>1.2</version>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t10-c</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>

            + "  <groupId>thegroup</groupId>\n"
            + "  <artifactId>base1</artifactId>\n"
            + "  <version>1</version>\n"
            + "  <packaging>pom</packaging>\n"
            + "  <dependencyManagement>\n"
            + "    <dependencies>\n"
            + "      <dependency>\n"
            + "        <groupId>thegroup</groupId>\n"

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>t04-b</artifactId>
  <packaging>jar</packaging>
  <version>2.0</version>