assertEquals("fallback", Optional.absent().or(Suppliers.ofInstance("fallback")));
  }

  public void testOr_nullSupplier_absent() {
    Supplier<Object> nullSupplier = (Supplier<Object>) Suppliers.<@Nullable Object>ofInstance(null);
    Optional<Object> absentOptional = Optional.absent();
    assertThrows(NullPointerException.class, () -> absentOptional.or(nullSupplier));
  }

                if (debug) {
                    List<Object> feedback = interpolator.getFeedback();
                    if (feedback != null && !feedback.isEmpty()) {
                        logger.debug("Maven encountered the following problems during initial POM interpolation:");

                        Object last = null;
                        for (Object next : feedback) {

        if (str == null) {
            return null;
        }
        return new String[] { str };
    }

    protected LocalDateTime toLocalDateTime(Object value) {
        return DfTypeUtil.toLocalDateTime(value);
    }

    protected Date toDate(Object value) {
        return DfTypeUtil.toDate(value);
    }

    protected SearchHits getSearchHits(final SearchResponse response) {

    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (createdBy != null) {
            addFieldToSource(sourceMap, "createdBy", createdBy);
        }
        if (createdTime != null) {

        ObjectFactory objects = project.getObjects();

        GradleDocumentationExtension extension = project.getExtensions().getByType(GradleDocumentationExtension.class);
        generateDslReference(project, layout, tasks, objects, extension);
    }

    private void generateDslReference(Project project, ProjectLayout layout, TaskContainer tasks, ObjectFactory objects, GradleDocumentationExtension extension) {

        @Override
        public @Nullable DummyInternalEntry getEntry() {
          return null;
        }

        @Override
        public void clear() {}

        @Override
        public @Nullable Object get() {
          return null;
        }

        @Override

/**
 * Implementation of {@link Multimaps#filterEntries(SetMultimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
final class FilteredEntrySetMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends FilteredEntryMultimap<K, V> implements FilteredSetMultimap<K, V> {

  FilteredEntrySetMultimap(SetMultimap<K, V> unfiltered, Predicate<? super Entry<K, V>> predicate) {
    super(unfiltered, predicate);

    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public Object getDatum() {
        return datum;
    }

    public void setDatum(Object datum) {
        this.datum = datum;
    }

    public String getScope() {
        return scope;
    }

    public void setScope(String scope) {

    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (createdTime != null) {
            addFieldToSource(sourceMap, "createdTime", createdTime);
        }
        if (expiredTime != null) {

    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (crawlingInfoId != null) {
            addFieldToSource(sourceMap, "crawlingInfoId", crawlingInfoId);
        }
        if (createdTime != null) {