assertEquals("three", pom.getValue(prefix + "stringParams/stringParam[3]"));
        assertEquals("four", pom.getValue(prefix + "stringParams/stringParam[4]"));
        assertEquals("key1", pom.getValue(prefix + "propertiesParam/property[1]/name"));
        assertEquals("key2", pom.getValue(prefix + "propertiesParam/property[2]/name"));
    }

    /* MNG-3864*/
    @Test

                    Object key = getPluginExecutionKey().apply(element);
                    merged.put(key, element);
                }

                for (PluginExecution element : src) {
                    Object key = getPluginExecutionKey().apply(element);
                    PluginExecution existing = merged.get(key);
                    if (existing != null) {

    }

    @Override
    public boolean equals(Object o) {
        return o instanceof Artifact && Objects.equals(key(), ((Artifact) o).key());
    }

    @Override
    public int hashCode() {
        return key.hashCode();
    }

    @Override
    public String toString() {
        return artifact.toString();
    }

 *
 * @since 4.0.0
 */
public interface ModelTransformerContext {

    /**
     * Key to get the TransformerContext from the SessionData
     */
    Object KEY = ModelTransformerContext.class;

    /**
     * Get the value of the Maven user property.
     */
    String getUserProperty(String key);

    /**
     * Get the model based on the path when resolving the parent based on relativePath.
     *

        String key = ArtifactUtils.versionlessKey( groupId, artifactId );

        Map artifactMap = project.getArtifactMap();

        assertNotNull( artifactMap, "artifact-map should not be null." );
        assertEquals( 1, artifactMap.size(), "artifact-map should contain 1 element." );

        Artifact artifact = (Artifact) artifactMap.get( key );

                try {
                    return Optional.of(injector.getInstance(Key.of(type, name)));
                } catch (DIException e) {
                    return Optional.empty();
                }
            }

            @Override
            public <T> List<T> lookupList(Class<T> type) {
                return injector.getInstance(new Key<List<T>>() {});
            }

            @Override

 * {@code org.apache.maven.api.spi.PathScopeProvider}.
 * <p>
 * Implementation must have {@code equals()} and {@code hashCode()} implemented, so implementations of this interface
 * can be used as keys.
 *
 * @since 4.0.0
 * @see org.apache.maven.api.services.DependencyResolver
 * @see DependencyScope
 */
@Experimental
@Immutable
public interface PathScope extends ExtensibleEnum {

/**
 * Caches auxiliary data used during model building like already processed raw/effective models. The data in the cache
 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the

        Map<String, MavenProject> index = new LinkedHashMap<>();
        Map<String, List<File>> collisions = new LinkedHashMap<>();

        for (MavenProject project : projects) {
            String projectId = ArtifactUtils.key(project.getGroupId(), project.getArtifactId(), project.getVersion());

            MavenProject collision = index.get(projectId);

            if (collision == null) {
                index.put(projectId, project);

    private boolean parallel;

    /**
     * Plugin context keyed by project ({@link MavenProject#getId()}) and by plugin lookup key
     * ({@link PluginDescriptor#getPluginLookupKey()}). Plugin contexts itself are mappings of {@link String} keys to
     * {@link Object} values.
     */
    @SuppressWarnings("checkstyle:linelength")