return emptySet();
    } else {
      return emptyList();
    }
  }

  @Override
  public void clear() {
    keySet().clear();
  }

  @Override
  Set<K> createKeySet() {
    return Sets.filter(unfiltered.keySet(), keyPredicate);
  }

  @Override
  public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);

      return emptySet();
    } else {
      return emptyList();
    }
  }

  @Override
  public void clear() {
    keySet().clear();
  }

  @Override
  Set<K> createKeySet() {
    return Sets.filter(unfiltered.keySet(), keyPredicate);
  }

  @Override
  public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);

 *   <li>{@link Lists}
 *   <li>{@link Maps}
 *   <li>{@link MoreCollectors}
 *   <li>{@link Multimaps}
 *   <li>{@link Multisets}
 *   <li>{@link ObjectArrays}
 *   <li>{@link Queues}
 *   <li>{@link Sets}
 *   <li>{@link Streams}
 *   <li>{@link Tables}
 * </ul>
 *
 * <h2>Abstract implementations</h2>
 *
 * <ul>
 *   <li>{@link AbstractIterator}
 *   <li>{@link AbstractSequentialIterator}

        }
    }

    /**
     * Returns the charset name.
     * @return the charsetName
     */
    public String getCharsetName() {
        return charsetName;
    }

    /**
     * Sets the charset name.
     * @param charsetName The charset name to set.
     */
    public void setCharsetName(final String charsetName) {
        this.charsetName = charsetName;
    }

     */
    public void delete(final BoostDocumentRule boostDocumentRule) {

        boostDocumentRuleBhv.delete(boostDocumentRule, op -> op.setRefreshPolicy(Constants.TRUE));

    }

    /**
     * Sets up search conditions for boost document rule list queries.
     * @param cb The condition bean for the query.
     * @param boostDocumentRulePager The pager containing search criteria.
     */

            cb.query().setProcessType_InScope(processTypeList);
            cb.fetchFirst(fessConfig.getPagePathMappingMaxFetchSizeAsInteger());
        });
    }

    /**
     * Sets up list condition for path mapping search.
     *
     * @param cb the condition bean
     * @param pathMappingPager the path mapping pager
     */

        queryList.add(candidate);
      }
    }
    shuffle(queryList, random);
    return queryList.toArray(new Element[0]);
  }

  private Set<Element> createData() {
    Set<Element> set = Sets.newHashSetWithExpectedSize(size);
    while (set.size() < size) {
      set.add(newElement());
    }
    return set;
  }

  private Element newElement() {
    int value = random.nextInt();

    }

    /**
     * Gets the extracted content.
     *
     * @return the extracted content
     */
    public String getContent() {
        return content;
    }

    /**
     * Sets the extracted content.
     *
     * @param content the content to set
     */
    public void setContent(final String content) {
        this.content = content;
    }

    /**

     * Lower numbers indicate higher priority.
     *
     * @return the priority value
     */
    public int getPriority() {
        return priority;
    }

    /**
     * Sets the priority of this ingester.
     * Lower numbers indicate higher priority.
     *
     * @param priority the priority value to set
     */
    public void setPriority(final int priority) {

                logger.debug("Failed to create {}.", componentName, e);
            } else {
                logger.info("{} is not available.", componentName);
            }
        }
    }

    /**
     * Sets the maximum client factory size.
     * @param maxClientFactorySize The maximum size.
     */
    public void setMaxClientFactorySize(final int maxClientFactorySize) {
        if (maxClientFactorySize <= 0) {