* ProjectManager} service.
 * <p>
 * Projects are created using the {@code ProjectBuilder} from a POM file
 * (usually named {@code pom.xml}) on the file system.
 * The {@link #getPomPath()} will point to the POM file and the
 * {@link #getBasedir()} to the directory parent containing the
 * POM file.
 * </p>
 *
 * @since 4.0.0
 * @see org.apache.maven.api.services.ProjectManager

        // Get relativePath (default is "../pom.xml" if not specified)
        String relativePath = parentElement.childText(MavenPomElements.Elements.RELATIVE_PATH);
        if (relativePath == null || relativePath.trim().isEmpty()) {
            relativePath = DEFAULT_PARENT_RELATIVE_PATH; // Maven default
        }

        // Only infer artifactId if relativePath is the default and we have multiple POMs

          <description>
            Defines a default phase to bind a Mojo execution to if the user does not explicitly set a phase in the POM.
            &lt;p>&lt;b>Note:&lt;/b> This will not automagically make a Mojo run when the plugin declaration is added
            to the POM. It merely enables the user to omit the {@code &lt;phase&gt;} element from the
            surrounding {@code &lt;execution&gt;} element.&lt;/p>

            {@code xml:space="preserve"} to elements you want to preserve whitespace.</p>
            <p>You can control how child POMs inherit configuration from parent POMs by adding {@code combine.children}
            or {@code combine.self} attributes to the children of the configuration element:</p>
            <ul>

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <groupId>com.google.guava</groupId>
  <artifactId>guava-parent</artifactId>
  <version>999.0.0-HEAD-android-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>Guava Maven Parent</name>

            Document parentDoc = Document.of(parentPomXml);
            Document childDoc = Document.of(childPomXml);

            // Both POMs are in the reactor
            Map<Path, Document> pomMap = Map.of(
                    Paths.get("pom.xml"), parentDoc,
                    Paths.get("child", "pom.xml"), childDoc);

            Element childRoot = childDoc.root();

    private Model read(String pom) throws Exception {
        String resource = "/poms/validation/" + pom;
        try (InputStream is = getClass().getResourceAsStream(resource)) {
            assertNotNull(is, "missing resource: " + resource);
            return new Model(new MavenStaxReader().read(is));
        }
    }

    private SimpleProblemCollector validate(String pom) throws Exception {

        File pom0 = new File(localRepo, "p0/pom.xml");
        File pom1 = new File(pom0.getParentFile(), "p1/pom.xml");
        File pom2 = new File(pom1.getParentFile(), "p2/pom.xml");
        File pom3 = new File(pom2.getParentFile(), "p3/pom.xml");
        File pom4 = new File(pom3.getParentFile(), "p4/pom.xml");
        File pom5 = new File(pom4.getParentFile(), "p5/pom.xml");

        File localRepo = getLocalRepositoryPath();
        File pom0 = new File(localRepo, "p0/pom.xml");

        File pom0Basedir = pom0.getParentFile();

        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load everything...
        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        File localRepo = getLocalRepositoryPath();
        File pom0 = new File(localRepo, "p0/pom.xml");
        File pom0Basedir = pom0.getParentFile();
        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load the child project, which inherits from p0...
        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);