*   <li><b>Package hierarchy:</b> if a {@code module-info.class} file is found at the root,
     *       then builds a singleton map with the module name declared in that descriptor.</li>
     *   <li><b>Module hierarchy:</b> if {@code module-info.class} files are found in sub-directories,
     *       at a deep intentionally restricted to one level, then builds a map of module names found
     *       in the descriptor of each sub-directory.</li>
     * </ul>

        super(message);
        this.lifecyclePhase = (lifecyclePhase != null) ? lifecyclePhase : "";
    }

    /**
     * Gets the lifecycle phase that was not found.
     *
     * @return The lifecycle phase that was not found, never {@code null}.
     */
    public String getLifecyclePhase() {
        return lifecyclePhase;
    }

    void tearDown() throws Exception {
        validator = null;
    }

    private void assertContains(String msg, String substring) {
        assertTrue(msg.contains(substring), "\"" + substring + "\" was not found in: " + msg);
    }

    @Test
    void testValidate() {
        Profile prof = Profile.newBuilder().id("xxx").build();
        Settings model = Settings.newBuilder().profiles(List.of(prof)).build();

     *
     * @param type the type of conflict resolver to obtain
     * @return the conflict resolver
     * @throws ConflictResolverNotFoundException
     *          if the specified type was not found
     */
    ConflictResolver getConflictResolver(String type) throws ConflictResolverNotFoundException;

import java.util.List;

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

/**
 * Exception caused when one or more artifacts can not be resolved because they are not found in the
 * local or remote repositories.
 */
public class MultipleArtifactsNotFoundException extends ArtifactResolutionException {
    private static final String LS = System.lineSeparator();

    /**
     * Gets the platform tool executable.
     *
     * @param toolName the tool platform independent tool name
     * @return file representing the tool executable, or null if the tool cannot be found
     */
    String findTool(String toolName);

    /**
     * Let the toolchain decide if it matches requirements defined
     * in the toolchain plugin configuration.

 *
 * @since 4.0.0
 */
public interface ModelSource extends Source {

    interface ModelLocator {
        /**
         * Returns the file containing the pom or null if a pom can not be
         * found at the given file or in the given directory.
         *
         * @since 4.0.0
         */
        @Nullable
        Path locateExistingPom(@Nonnull Path project);
    }

    @Nullable

                        "Cannot read toolchains file at " + userToolchainsFile.getAbsolutePath(), e);
            }

        } else if (userToolchainsFile != null) {
            logger.debug("Toolchains configuration was not found at {}", userToolchainsFile);
        }

        return toolchains;
    }

            String prefix,
            List<String> pluginGroups,
            LocalRepository localRepository,
            List<RemoteRepository> remoteRepositories) {
        super("No plugin found for prefix '" + prefix + "' in the current project and in the plugin groups "
                + pluginGroups + " available from the repositories " + format(localRepository, remoteRepositories));
    }

            return determineBuildOutputDirectoryForArtifact(project, artifact);
        }

        // The fall-through indicates that the artifact cannot be found;
        // for instance if package produced nothing or classifier problems.
        return null;
    }

    private File determineBuildOutputDirectoryForArtifact(final MavenProject project, final Artifact artifact) {