toLoad.add(root);
                while (!toLoad.isEmpty()) {
                    Path pom = toLoad.remove(0);
                    try {
                        ModelBuildingRequest gaBuildingRequest =
                                new DefaultModelBuildingRequest(request).setModelSource(new FileModelSource(pom));
                        Model rawModel = defaultModelBuilder.readFileModel(gaBuildingRequest, problems);

    - name: Set up JDK 11
      uses: actions/setup-java@v2
      with:
        java-version: '11'
        distribution: 'adopt'
    - name: Build with Maven

      <snapshotVersion>
        <extension>jar</extension>
        <value>12.2.0-20180814.210714-10</value>
        <updated>20180814210714</updated>
      </snapshotVersion>
      <snapshotVersion>
        <extension>pom</extension>
        <value>12.2.0-20180814.210714-10</value>
        <updated>20180814210714</updated>
      </snapshotVersion>
      <snapshotVersion>
        <classifier>sources</classifier>

                                .setMessage("Ignored POM import for: " + toString(dependency) + " as already imported "
                                        + toString(present) + ". Add the conflicting managed dependency directly "
                                        + "to the dependencyManagement section of the POM."));
                    }
                }
            }

        run: ./mvnw install -e -B -V -DdistributionFileName=apache-maven -DskipTests -f maven/pom.xml

      - name: Running integration tests
        shell: bash
        run: ./mvnw install -e -B -V -Prun-its,embedded -DmavenDistro="$GITHUB_WORKSPACE/maven/apache-maven/target/apache-maven-bin.zip" -f maven-integration-testing/pom.xml

      - name: Upload artifact on integration testing
        uses: actions/upload-artifact@v4

// CHECKSTYLE_OFF: RegexpHeader|LineLength
/**
 * XML reader and writer classes for Maven POM, generated from <code>maven.mdo</code> model.
 * These classes use
 * <a href="https://codehaus-plexus.github.io/plexus-utils/apidocs/org/codehaus/plexus/util/xml/pull/package-summary.html">plexus-utils'
 * XML Pull Parser API</a> for their internal XML handling and

    - name: Set up JDK 11
      uses: actions/setup-java@v2
      with:
        java-version: '11'
        distribution: 'temurin'
    - name: Build with Maven

- circular dependency
- artifact missing
- artifact retrieval exception
- md5 checksum doesn't match for local artifact, need to redownload this
- POM doesn't exist for a goal that requires one
- parent POM missing (in both the repository + relative path)
- component not found

Plugins:
- plugin metadata missing
- plugin metadata retrieval problem
- plugin artifact missing
- plugin artifact retrieval problem

    @Deprecated
    public MavenExecutionRequest setPomFile(String pomFilename) {
        if (pomFilename != null) {
            pom = new File(pomFilename);
        }

        return this;
    }

    @Override
    public MavenExecutionRequest setPom(File pom) {
        this.pom = pom;

        return this;
    }

    @Override
    public MavenExecutionRequest setInteractiveMode(boolean interactive) {

~~ under the License.

 -----
 Introduction
 -----
 Jason van Zyl
 Vincent Siveton
 Hervé Boutemy
 -----
 2011-06-12
 -----

Maven Model

 This is strictly the model for Maven POM (Project Object Model) in <<<org.apache.maven.model>>> package,
 delegating content to {{{../api/maven-api-model/index.html}Maven 4 API immutable model}}. All the effective model