<forkId implementation="int" default-value="-1">${forkId}</forkId>
      </configuration>
    </mojo>
    <mojo>
      <goal>clear-fork-context</goal>
      <description>Tear down any build state used during the previous forked execution.</description>
      <requiresDirectInvocation>false</requiresDirectInvocation>
      <requiresProject>false</requiresProject>
      <requiresReports>false</requiresReports>

  <groupId>org.apache.maven.its.mng3979</groupId>
  <artifactId>parent</artifactId>
  <version>0.1</version>
  <packaging>pom</packaging>

  <name>Maven Integration Test :: MNG-3979</name>
  <description>
    Test that during inheritance the merging/joining of subtrees with equal identifier doesn't crash if the parent
    POM has a non-empty element and the child POM has an empty element to join.
  </description>

  <properties>

import org.apache.maven.project.MavenProject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Utility class to extract {@link MavenProject} from the project graph during the execution phase based on optional or
 * required selectors.
 */
public final class ProjectSelector {
    private static final Logger LOGGER = LoggerFactory.getLogger(ProjectSelector.class);

          <type>boolean</type>
          <description>
            Marks this Mojo as being thread-safe, i.e. the Mojo safely supports concurrent execution during parallel
            builds. Mojos without this annotation will make Maven output a warning when used during a parallel build
            session.
            @since Maven 3.0.
          </description>
          <defaultValue>false</defaultValue>
        </field>

  <groupId>org.apache.maven.its.mng4416</groupId>
  <artifactId>test</artifactId>
  <version>0.1</version>

  <name>Maven Integration Test :: MNG-4416</name>
  <description>
    Test that merging of plugins during profile injection follows these rules regarding ordering:
     model:   X ->      A -> B ->      D -> E
     profile:      Y -> A ->      C -> D ->      F
     result:  X -> Y -> A -> B -> C -> D -> E -> F
  </description>

     * Maven-Resolver without involving Maven Core and related things.
     * <p>
     * This type registry is NOT used by Maven Core: Maven replaces it during Session creation with a type registry
     * that supports extending it (i.e. via Maven Extensions).
     * <p>
     * Important: this "static" list of types should be in-sync with core provided types.
     */

import org.apache.maven.internal.impl.model.DefaultModelTransformerContext.Holder;

/**
 * Builds up the transformer context.
 * After the buildplan is ready, the build()-method returns the immutable context useful during distribution.
 * This is an inner class, as it must be able to call readRawModel()
 *
 * @since 4.0.0
 */
class DefaultModelTransformerContextBuilder implements ModelTransformerContextBuilder {

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.versioning.OverConstrainedVersionException;

/**
 * Specific problems during resolution that we want to account for:
 * <ul>
 *   <li>missing metadata</li>
 *   <li>version range violations</li>
 *   <li>version circular dependencies</li>
 *   <li>missing artifacts</li>

 * without prior notice.
 *
 */
@Named
@Singleton
public class DefaultClassRealmManager implements ClassRealmManager {
    public static final String API_REALMID = "maven.api";

    /**
     * During normal command line build, ClassWorld is loaded by jvm system classloader, which only includes
     * plexus-classworlds jar and possibly javaagent classes, see https://issues.apache.org/jira/browse/MNG-4747.
     * <p>

 * @since 4.0.0
 */
@Experimental
@Immutable
public interface ModelBuilderRequest {

    /**
     * Denotes minimal validation of POMs. This validation level is meant for processing of POMs from repositories
     * during metadata retrieval.
     */
    int VALIDATION_LEVEL_MINIMAL = 0;

    /**
     * Denotes validation as performed by Maven 2.0. This validation level is meant as a compatibility mode to allow