return deque;
  }

  // ConcurrentLinkedQueue

  /** Creates an empty {@code ConcurrentLinkedQueue}. */
  @J2ktIncompatible
  @GwtIncompatible // ConcurrentLinkedQueue
  public static <E> ConcurrentLinkedQueue<E> newConcurrentLinkedQueue() {
    return new ConcurrentLinkedQueue<>();
  }

  /**
   * Creates a {@code ConcurrentLinkedQueue} containing the elements of the specified iterable, in

    return new CountingRemovalListener<>();
  }

  /** {@link RemovalListener} that adds all {@link RemovalNotification} objects to a queue. */
  @GwtIncompatible // ConcurrentLinkedQueue
  static class QueuingRemovalListener<K, V> extends ConcurrentLinkedQueue<RemovalNotification<K, V>>
      implements RemovalListener<K, V> {

    @Override
    public void onRemoval(RemovalNotification<K, V> notification) {
      add(notification);

    return deque;
  }

  // ConcurrentLinkedQueue

  /** Creates an empty {@code ConcurrentLinkedQueue}. */
  @J2ktIncompatible
  @GwtIncompatible // ConcurrentLinkedQueue
  public static <E> ConcurrentLinkedQueue<E> newConcurrentLinkedQueue() {
    return new ConcurrentLinkedQueue<>();
  }

  /**
   * Creates a {@code ConcurrentLinkedQueue} containing the elements of the specified iterable, in

    protected int userInfoCacheSize = 10000;

    /** Queue for storing search logs. */
    protected Queue<SearchLog> searchLogQueue = new ConcurrentLinkedQueue<>();

    /** Queue for storing click logs. */
    protected Queue<ClickLog> clickLogQueue = new ConcurrentLinkedQueue<>();

    /** Cache for storing user information. */
    protected LoadingCache<String, UserInfo> userInfoCache;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.CoreLibConstants;

   *     the size method
   */
  public static <T extends @Nullable Object> Collection<T> misleadingSizeCollection(int delta) {
    // It would be nice to be able to return a real concurrent
    // collection like ConcurrentLinkedQueue, so that e.g. concurrent
    // iteration would work, but that would not be GWT-compatible.
    // We are not "just" inheriting from ArrayList here as this doesn't work for J2kt.
    return new AbstractList<T>() {

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;

import org.codelibs.core.io.FileUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.misc.DynamicProperties;