* can be used as the identifier for the super POM.
     *
     * @param modelId The identifier of the desired raw model, must not be {@code null}.
     * @return The raw model or {@code null} if the specified model id does not refer to a known model.
     */
    @Nonnull
    Optional<Model> getRawModel(@Nonnull String modelId);

    /**

                () -> newModelResolver().resolveModel(session, parent, new AtomicReference<>()),
                "Expected 'ModelResolverException' not thrown.");
        assertEquals("The requested version range '[1,)' does not specify an upper bound", e.getMessage());
    }

    @Test
    void testResolveParentSuccessfullyResolvesExistingParentWithoutRange() throws Exception {
        final Parent parent = Parent.newBuilder()

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.eventspy;

/**
 * A skeleton eventspy that does nothing other than helping implementors.
 * @since 3.0.2
 */
public abstract class AbstractEventSpy implements EventSpy {

    public void init(Context context) throws Exception {}

    private final String groupId;

    private final String artifactId;

    public PluginVersionNotFoundException(String groupId, String artifactId) {
        super("The plugin '" + groupId + ":" + artifactId + "' does not exist or no valid version could be found");

        this.groupId = groupId;
        this.artifactId = artifactId;
    }

    public String getGroupId() {
        return groupId;
    }

 *
 * @since 3.0
 */
class DefaultPluginVersionResult implements PluginVersionResult {

    private String version;

    private ArtifactRepository repository;

    DefaultPluginVersionResult() {
        // does nothing
    }

    DefaultPluginVersionResult(String version) {
        this.version = version;
    }

    public String getVersion() {
        return version;
    }

class DefaultPluginPrefixResult implements PluginPrefixResult {

    private String groupId;

    private String artifactId;

    private ArtifactRepository repository;

    DefaultPluginPrefixResult() {
        // does nothing
    }

    DefaultPluginPrefixResult(Plugin plugin) {
        groupId = plugin.getGroupId();
        artifactId = plugin.getArtifactId();
    }

                throw new UnresolvableModelException(
                        String.format(
                                "The requested parent version range '%s' does not specify an upper bound",
                                parent.getVersion()),
                        parent.getGroupId(),
                        parent.getArtifactId(),
                        parent.getVersion());

        return CacheUtils.pluginEquals(a, b);
    }

    public void register(MavenProject project, Key cacheKey, CacheRecord record) {
        // default cache does not track record usage
    }

        System.out.println("Result: " + result);

        assertSame(
                exec.getMojoDescriptor().getPluginDescriptor(),
                result,
                "${plugin} expression does not return plugin descriptor.");
    }

    @Test
    void testPluginArtifactsExpressionReference() throws Exception {
        MojoExecution exec = newMojoExecution();

        }
        return type;
    }

    /**
     * Selects the type of path where to place the given dependency.
     * This method returns one of the values specified in the given collection.
     * This method does not handle the patch-module paths, because the patches
     * depend on which modules have been previously added on the module-paths.
     *
     * <p>If the dependency can be a constituent of both the class-path and the module-path,