}

    @Internal
    protected
    fun getContributorsFromPullRequests(): Set<GitHubUser> {
        if (!milestone.isPresent) {
            error("Milestone not set: please rerun the task with `--milestone <milestone>`")
        }
        val prs: MutableList<GitHubPullRequest> = mutableListOf()
        for (page in 1..10) {

        ArrayList<CIInfo> result = ServiceLoader.load(CIDetector.class).stream()
                .map(ServiceLoader.Provider::get)
                .map(CIDetector::detectCI)
                .filter(Optional::isPresent)
                .map(Optional::get)
                .collect(Collectors.toCollection(ArrayList::new));

        if (result.size() > 1) {
            // remove generic

        // CLI args
        MavenOptions cliOptions = parseMavenCliOptions(context.parserRequest.args());
        result.add(cliOptions);
        // atFile option
        if (cliOptions.atFile().isPresent()) {
            Path file = context.cwd.resolve(cliOptions.atFile().orElseThrow());
            if (Files.isRegularFile(file)) {
                result.add(parseMavenAtFileOptions(file));
            } else {

  }

  public void testIsPresent_no() {
    assertFalse(Optional.absent().isPresent());
  }

  @SuppressWarnings("OptionalOfRedundantMethod") // Unit tests for Optional
  public void testIsPresent_yes() {
    assertTrue(Optional.of("training").isPresent());
  }

  public void testGet_absent() {
    Optional<String> optional = Optional.absent();

    @get:Optional
    @get:Input
    val androidSdkRoot: Provider<String> = project.providers.environmentVariable("ANDROID_SDK_ROOT")

    @TaskAction
    fun warmup() {
        if (!androidHome.isPresent && !androidSdkRoot.isPresent) {
            logger.lifecycle("Skip warmning up Android home because ANDROID_HOME/ANDROID_SDK_ROOT env vars are not set.")
            return
        }
        sdkVersions.orNull.orEmpty().forEach { version ->

            val androidStudioPath = studioInstallation.studioInstallLocation.asFile.get().absolutePath
            return "-Dstudio.home=$androidStudioPath"
        } else if (androidStudioHome.isPresent) {
            return "-Dstudio.home=${androidStudioHome.get()}"
        }

        }.orElse(
            Optional.empty<T>()
        )
    }.reduce { acc, next ->
        acc.zip(next) { left, right ->
            when {
                left.isPresent -> {
                    require(!right.isPresent) {
                        "Expected at most one provider to be present"
                    }
                    left
                }
                else -> right
            }

                    .setProcessPlugins(request.isProcessPlugins());
            ProjectBuildingResult res;
            if (request.getPath().isPresent()) {
                Path path = request.getPath().get();
                res = builder.build(path.toFile(), req);
            } else if (request.getSource().isPresent()) {
                Source source = request.getSource().get();
                ModelSource2 modelSource = new SourceWrapper(source);

   *
   * @throws IOException if an I/O error occurs
   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> sizeIfKnown = sizeIfKnown();
    if (sizeIfKnown.isPresent()) {
      return sizeIfKnown.get() == 0L;
    }
    Closer closer = Closer.create();
    try {
      InputStream in = closer.register(openStream());
      return in.read() == -1;
    } catch (Throwable e) {

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {
    throw new IllegalStateException("Optional.get() cannot be called on an absent value");
  }

  @Override
  public T or(T defaultValue) {