while (!queue.isEmpty()) {
      Feature<?> feature = queue.remove();
      for (Feature<?> implied : feature.getImpliedFeatures()) {
        if (features.add(implied)) {
          queue.add(implied);
        }
      }
    }
    return features;
  }

  /**
   * Given a set of features, return a new set of all features directly or indirectly implied by any
   * of them.
   *

	numVersions := 4
	obj := ObjectInfo{
		Name:        "foo",
		ModTime:     time.Now().Add(-31 * 24 * time.Hour),
		Size:        100 << 20,
		VersionID:   uuid.New().String(),
		IsLatest:    true,
		NumVersions: numVersions,
	}
	delMarker := ObjectInfo{
		Name:         "foo-deleted",
		ModTime:      time.Now().Add(-61 * 24 * time.Hour),
		Size:         0,
		VersionID:    uuid.New().String(),

                        }
                    } else if (langs.length > 1) {
                        readings.add(text.toUpperCase() + "_" + lang);
                    } else {
                        readings.add(text.toUpperCase());
                    }
                }
            }

            return readings;
        }
    }

    /**

    AddRejectingList(@ParametricNullness K key) {
      this.key = key;
    }

    @Override
    public boolean add(@ParametricNullness V v) {
      add(0, v);
      return true;
    }

    @Override
    public void add(int index, @ParametricNullness V element) {
      checkPositionIndex(index, 0);
      throw new IllegalArgumentException("Key does not satisfy predicate: " + key);

    AddRejectingList(@ParametricNullness K key) {
      this.key = key;
    }

    @Override
    public boolean add(@ParametricNullness V v) {
      add(0, v);
      return true;
    }

    @Override
    public void add(int index, @ParametricNullness V element) {
      checkPositionIndex(index, 0);
      throw new IllegalArgumentException("Key does not satisfy predicate: " + key);

                for (final String u : paths) {
                    final String v = systemHelper.normalizeConfigPath(u);
                    if (StringUtil.isNotBlank(v)) {
                        pathPatterList.add(Pattern.compile(systemHelper.encodeUrlFilter(v)));
                    }
                }
                includedDocPathPatterns = pathPatterList.toArray(new Pattern[pathPatterList.size()]);
            } else {

                  protected Set<String> create(String[] elements) {
                    CompactHashSet<String> set = CompactHashSet.create(asList(elements));
                    for (int i = 0; i < 100; i++) {
                      set.add("extra" + i);
                    }
                    for (int i = 0; i < 100; i++) {
                      set.remove("extra" + i);
                    }
                    set.trimToSize();

            if (this.winsServer.length == 0) {
                this.resolverOrder.add(ResolverType.RESOLVER_LMHOSTS);
                this.resolverOrder.add(ResolverType.RESOLVER_DNS);
            } else {
                this.resolverOrder.add(ResolverType.RESOLVER_LMHOSTS);
                this.resolverOrder.add(ResolverType.RESOLVER_DNS);
                this.resolverOrder.add(ResolverType.RESOLVER_WINS);
            }

    apply {
      headersBuilder = Headers.Builder()
    }

  fun addHeader(header: String) =
    apply {
      headersBuilder.add(header)
    }

  fun addHeader(
    name: String,
    value: Any,
  ) = apply {
    headersBuilder.add(name, value.toString())
  }

  fun addHeaderLenient(
    name: String,
    value: Any,
  ) = apply {

            final int res = getResult();
            if (res != UNSPECIFIED_RESULT) {
                fields.add(new DERTaggedObject(true, 0, new ASN1Enumerated(res)));
            }
            final ASN1ObjectIdentifier mech = getMechanism();
            if (mech != null) {
                fields.add(new DERTaggedObject(true, 1, mech));
            }
            final byte[] mechanismToken = getMechanismToken();