* property which happens very early.  The implementation used in this case
 * will be discovered using the JDK service mechanism.
 *
 * The default implementation will look for a {@code .mvn} child directory
 * or a {@code pom.xml} containing the {@code root="true"} attribute.
 */
public interface RootLocator {

    String UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE = "Unable to find the root directory. "

        String childPath = child.getProperties().getOrDefault(CHILD_DIRECTORY_PROPERTY, child.getArtifactId());
        hints.put(CHILD_DIRECTORY, childPath);
        hints.put(MavenModelMerger.CHILD_PATH_ADJUSTMENT, getChildPathAdjustment(child, parent, childPath));
        return merger.merge(child, parent, false, hints);
    }

    /**

            <stringParam>CHILD-1</stringParam>
            <stringParam>CHILD-3</stringParam>
            <stringParam>CHILD-2</stringParam>
            <stringParam>CHILD-4</stringParam>
          </stringParams>
          <listParam combine.children="append">
            <!-- NOTE: These values are deliberately not in alpha order! -->
            <listParam>CHILD-1</listParam>
            <listParam>CHILD-3</listParam>

            <stringParam>CHILD-1</stringParam>
            <stringParam>CHILD-3</stringParam>
            <stringParam>CHILD-2</stringParam>
            <stringParam>CHILD-4</stringParam>
          </stringParams>
          <listParam combine.children="append">
            <!-- NOTE: These values are deliberately not in alpha order! -->
            <listParam>CHILD-1</listParam>
            <listParam>CHILD-3</listParam>

        <executions>
          <execution>
            <id>child-1</id>
            <phase>validate</phase>
            <goals>
              <goal>child-1</goal>
            </goals>
          </execution>
          <execution>
            <id>child-2</id>
            <phase>validate</phase>
            <goals>
              <goal>child-2</goal>
            </goals>
          </execution>
          <execution>

    /**
     * Merges values from the specified parent model into the given child model. Implementations are expected to keep
     * parent and child completely decoupled by injecting deep copies of objects into the child rather than the original
     * objects from the parent.
     *
     * @param child The child model into which to merge the values inherited from the parent, must not be
     *            <code>null</code>.

        <executions>
          <execution>
            <id>child-1</id>
            <phase>validate</phase>
            <goals>
              <goal>child-1</goal>
            </goals>
          </execution>
          <execution>
            <id>child-2</id>
            <phase>validate</phase>
            <goals>
              <goal>child-2</goal>
            </goals>
          </execution>
          <execution>

        selectors.add(":maven-core");

        final MavenProject mavenProject = createMavenProject("maven-core");
        final MavenProject child = createMavenProject("maven-core-child");
        mavenProject.setCollectedProjects(Collections.singletonList(child));
        final List<MavenProject> listOfProjects = Collections.singletonList(mavenProject);

        final Set<MavenProject> requiredProjectsBySelectors =

  <packaging>jar</packaging>

  <name>Maven Integration Test :: MNG-4102 :: Child</name>
  <description>
    Verify that the effective value of an inherited property reflects the values of any nested property
    as defined by the child. This boils down to the order of inheritance and (parent) interpolation.
  </description>

  <properties>
    <overridden>CHILD</overridden>
  </properties>

  <profiles>
    <profile>

    <artifactId>parent-2</artifactId>
    <version>0.1</version>
  </parent>

  <artifactId>child-2</artifactId>

  <name>Maven Integration Test :: MNG-3937</name>
  <description>
    Test that during inheritance/merging of a plugin execution the goals specified by child and parent are properly
    ordered.
  </description>

  <build>
    <plugins>
      <plugin>