// way for it to return a false negative would be for the target value to jump around in the map
    // such that none of the subsequent iterations observed it, despite the fact that at every point
    // in time it was present somewhere int the map. This becomes increasingly unlikely as
    // CONTAINS_VALUE_RETRIES increases, though without locking it is theoretically possible.
    Segment<K, V, E, S>[] segments = this.segments;
    long last = -1L;

#### Issue: Imported documents not appearing in search

**Solution**:
1. Check if documents were indexed:
   - Admin > System > Search
   - Try searching by exact URL
2. Verify required fields are present:
   - `url`, `title`, `content`
3. Check crawler logs: `logs/fess-crawler.log`
4. Manually trigger re-indexing:
   - Admin > Scheduler
   - Run "Default Crawler" job

                    if (values == null || values.length == 0) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("Parameter '{}' is not present or has no value.", s);
                        }
                        return null;
                    }
                    return new RequestParameter(s, values);

      return multimap.containsValue(object);
    }

    @Override
    public UnmodifiableIterator<V> iterator() {
      return multimap.valueIterator();
    }

    @GwtIncompatible // not present in emulated superclass
    @Override
    int copyIntoArray(@Nullable Object[] dst, int offset) {
      for (ImmutableCollection<V> valueCollection : multimap.map.values()) {

              || cut.compareTo(restriction.upperBound) >= 0) {
            return null;
          } else if (cut.equals(restriction.lowerBound)) {
            // it might be present, truncated on the left
            Range<C> candidate = Maps.valueOrNull(rangesByLowerBound.floorEntry(cut));
            if (candidate != null && candidate.upperBound.compareTo(restriction.lowerBound) > 0) {

// conversion succeeded.
func (v Value) ToBool() (val bool, ok bool) {
	val, ok = v.value.(bool)
	return val, ok
}

// ToTimestamp returns the timestamp value if present.
func (v Value) ToTimestamp() (t time.Time, ok bool) {
	t, ok = v.value.(time.Time)
	return t, ok
}

// ToBytes returns the value if byte-slice.
func (v Value) ToBytes() (val []byte, ok bool) {

	if err != nil {
		c.Fatalf("unable to setup Etcd for tests: %v", err)
	}

	s.RestartIAMSuite(c)
}

func (s *TestSuiteIAM) SetUpSuite(c *check) {
	// If etcd backend is specified and etcd server is not present, the test
	// is skipped.
	etcdServer := env.Get(EnvTestEtcdBackend, "")
	if s.withEtcdBackend && etcdServer == "" {
		c.Skip("Skipping etcd backend IAM test as no etcd server is configured.")
	}

     * ValueReference instance.
     */
    boolean isLoading();

    /**
     * Returns true if this reference contains an active value, meaning one that is still considered
     * present in the cache. Active values consist of live values, which are returned by cache
     * lookups, and dead values, which have been evicted but awaiting removal. Non-active values

            try {
              Thread.sleep(SECONDS.toMillis(10));
            } catch (InterruptedException ignored) {
              Thread.currentThread().interrupt(); // preserve status
            }
          }
        };
    Thread t =
        new Thread() {
          @Override
          public void run() {
            f.set("foo");
          }
        };

   * JdkBackedSetBuilderImpl.
   */
  private static final class RegularSetBuilderImpl<E> extends SetBuilderImpl<E> {
    // null until at least two elements are present
    private @Nullable Object @Nullable [] hashTable;
    private int maxRunBeforeFallback;
    private int expandTableThreshold;
    private int hashCode;

    RegularSetBuilderImpl(int expectedCapacity) {