if (request.getGlobalToolchainsSource().isPresent()) {
                req.setGlobalToolchainsSource(new MappedToolchainsSource(
                        request.getGlobalToolchainsSource().get()));
            } else if (request.getGlobalToolchainsPath().isPresent()) {
                req.setGlobalToolchainsSource(new org.apache.maven.building.FileSource(

            if (request.getGlobalSettingsSource().isPresent()) {
                req.setGlobalSettingsSource(new MappedSettingsSource(
                        request.getGlobalSettingsSource().get()));
            }
            if (request.getGlobalSettingsPath().isPresent()) {
                req.setGlobalSettingsFile(request.getGlobalSettingsPath().get().toFile());
            }

    assertThat(Enums.getIfPresent(TestEnum.class, "POODLE")).hasValue(TestEnum.POODLE);

    assertThat(Enums.getIfPresent(TestEnum.class, "CHEETO")).isPresent();
    assertThat(Enums.getIfPresent(TestEnum.class, "HONDA")).isPresent();
    assertThat(Enums.getIfPresent(TestEnum.class, "POODLE")).isPresent();

    assertThat(Enums.getIfPresent(TestEnum.class, "CHEETO")).hasValue(TestEnum.CHEETO);

            if (!wildcardType.getExtendedType().isPresent() && !wildcardType.getSuperType().isPresent()) {
                typeMetaData.setWildcard();
            } else {
                wildcardType.getExtendedType().ifPresent(referenceType -> typeMetaData.setUpperBounds(extractTypeName(referenceType)));
                wildcardType.getSuperType().ifPresent(referenceType -> typeMetaData.setLowerBounds(extractTypeName(referenceType)));

  Optional() {}

  /**
   * Returns {@code true} if this holder contains a (non-null) instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> no differences.
   */
  public abstract boolean isPresent();

  /**
   * Returns the contained instance, which must be present. If the instance might be absent, use
   * {@link #or(Object)} or {@link #orNull} instead.
   *

        return !((java.util.Optional<?>) value).isPresent();
      } else if (value instanceof OptionalInt) {
        return !((OptionalInt) value).isPresent();
      } else if (value instanceof OptionalLong) {
        return !((OptionalLong) value).isPresent();
      } else if (value instanceof OptionalDouble) {
        return !((OptionalDouble) value).isPresent();
      } else if (value instanceof Optional) {

  }

  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();
    try {
      optional.get();

   *
   * @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) {

  }

  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();
    try {
      optional.get();

        Collection<DependencyCoordinate> dependencies;
        Collection<DependencyCoordinate> managedDependencies;
        List<RemoteRepository> remoteRepositories;
        if (request.getProject().isPresent()) {
            Project project = request.getProject().get();
            rootArtifact = project.getPomArtifact();
            root = null;
            dependencies = project.getDependencies();