return directories.flatMap {
    it
      .listFiles()
      .orEmpty()
      .filter { f -> f.isFile }
      .toList()
  }
}

internal class MainTestProvider : SimpleProvider() {
  override fun arguments(): List<Any> {
    val mainFiles = mainFiles()
    return mainFiles
      .map {
        val suffix = it.path.replace("${prefix}samples/guide/src/main/java/", "")
        suffix

import org.apache.maven.cling.invoker.mvnup.UpgradeContext;

/**
 * The "help" goal implementation.
 */
@Named("help")
@Singleton
public class Help implements Goal {

    @Override
    public int execute(UpgradeContext context) throws Exception {
        context.info("Maven Upgrade Tool - Help");
        context.println();
        context.info("Upgrades Maven projects to be compatible with Maven 4.");

/**
 * @deprecated use {@code org.apache.maven.api.services.model.RootLocator} instead
 */
@Named
@Deprecated(since = "4.0.0")
public class DefaultRootLocator implements RootLocator {

    @Override
    public boolean isRootDirectory(Path dir) {
        if (Files.isDirectory(dir.resolve(".mvn"))) {
            return true;
        }
        // we're too early to use the modelProcessor ...

    @VisibleForTesting
    data class AcceptedApiChange(
        val type: String?,
        val member: String?,
        val acceptation: String?,
        val changes: List<String>?
    ) {
        override fun toString(): String = "Type: '$type', Member: '$member'"
    }

    @VisibleForTesting
    data class AcceptedApiChanges(
        val acceptedApiChanges: List<AcceptedApiChange>?
    )

    //                                                                           Meta Data
    //                                                                           =========
    @Override
    protected String getBodyFile() {
        return PATH;
    }

    @Override
    protected String[] getPropertyNames() {
        return new String[] { "hostname", "jobname", "webFsCrawlStartTime", "webFsCrawlEndTime", "webFsCrawlExecTime", "webFsIndexExecTime",

  @Deprecated
  public static <N, V> ImmutableValueGraph<N, V> copyOf(ImmutableValueGraph<N, V> graph) {
    return checkNotNull(graph);
  }

  @Override
  public ElementOrder<N> incidentEdgeOrder() {
    return ElementOrder.stable();
  }

  @Override
  public ImmutableGraph<N> asGraph() {
    return new ImmutableGraph<>(this); // safe because the view is effectively immutable
  }

    private boolean insecureBasic;

    /** The authentication realm */
    private String realm;

    /** The CIFS context for transport operations */
    private CIFSContext transportContext;

    @Override
    public void init(final ServletConfig config) throws ServletException {
        super.init(config);

        final Properties p = new Properties();
        p.putAll(System.getProperties());
        /*

    //                                                                              ======
    @Override
    protected void setupHtmlData(final ActionRuntime runtime) {
        super.setupHtmlData(runtime);
        runtime.registerData("helpLink", systemHelper.getHelpLink(fessConfig.getOnlineHelpNameCrawlinginfo()));
    }

    @Override
    protected String getActionRole() {
        return ROLE;
    }

    //                                                                              ======
    @Override
    protected void setupHtmlData(final ActionRuntime runtime) {
        super.setupHtmlData(runtime);
        runtime.registerData("helpLink", systemHelper.getHelpLink(fessConfig.getOnlineHelpNameFailureurl()));
    }

    @Override
    protected String getActionRole() {
        return ROLE;
    }

     */
    @Override
    protected void setupHtmlData(final ActionRuntime runtime) {
        super.setupHtmlData(runtime);
        runtime.registerData("helpLink", systemHelper.getHelpLink(fessConfig.getOnlineHelpNameJoblog()));
    }

    /**
     * Returns the action role for this admin action.
     *
     * @return the role name
     */
    @Override
    protected String getActionRole() {