}

    @Override
    public boolean isEmpty() {
        return map.isEmpty();
    }

    @Override
    public boolean contains(final Object o) {
        return map.containsKey(o);
    }

    @Override
    public boolean add(final String o) {
        return map.put(o, PRESENT) == null;
    }

    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;

    /**
     * Total number of pages.
     */
    private int allPageCount;

    /**
     * Flag indicating if a previous page exists.
     */
    private boolean existPrePage;

    /**
     * Flag indicating if a next page exists.
     */
    private boolean existNextPage;

    /**
     * List of page numbers for pagination.
     */
    private List<Integer> pageNumberList;

    /**

    private int capability;
    private int linkSpeed; // In units of 1 Mbps
    private byte[] sockaddrStorage;
    private InetAddress address;
    private boolean ipv6;
    private boolean rssCapable; // Receive Side Scaling
    private boolean rdmaCapable;

    /**
     * Create network interface info
     *
     * @param address interface address
     * @param linkSpeed link speed in Mbps
     */

    taskDone = false;
    Callable<Boolean> task =
        () -> {
          taskDone = true;
          return taskDone;
        };
    List<Future<Boolean>> futureList = executor.invokeAll(ImmutableList.of(task), 10, MILLISECONDS);
    Future<Boolean> future = futureList.get(0);
    assertFalse(taskDone);
    assertTrue(future.isDone());

    taskDone = false;
    Callable<Boolean> task =
        () -> {
          taskDone = true;
          return taskDone;
        };
    List<Future<Boolean>> futureList = executor.invokeAll(ImmutableList.of(task), 10, MILLISECONDS);
    Future<Boolean> future = futureList.get(0);
    assertFalse(taskDone);
    assertTrue(future.isDone());

    )
  }

  class Builder {
    internal var tls: Boolean = false
    internal var cipherSuites: Array<String>? = null
    internal var tlsVersions: Array<String>? = null
    internal var supportsTlsExtensions: Boolean = false

    internal constructor(tls: Boolean) {
      this.tls = tls
    }

    constructor(connectionSpec: ConnectionSpec) {

    /**
     * The total number of pages available.
     */
    private int allPageCount;

    /**
     * Whether a previous page exists.
     */
    private boolean existPrePage;

    /**
     * Whether a next page exists.
     */
    private boolean existNextPage;

    /**
     * The list of page numbers for navigation.
     */
    private List<Integer> pageNumberList;

    /**

    private int allRecordCount;

    /** Total number of pages available. */
    private int allPageCount;

    /** Flag indicating if a previous page exists. */
    private boolean existPrePage;

    /** Flag indicating if a next page exists. */
    private boolean existNextPage;

    /** List of page numbers for pagination navigation. */
    private List<Integer> pageNumberList;

    /** Number of records to display per page. */

    private int allRecordCount;

    /** The total number of pages. */
    private int allPageCount;

    /** Indicates if a previous page exists. */
    private boolean existPrePage;

    /** Indicates if a next page exists. */
    private boolean existNextPage;

    /** The list of page numbers. */
    private List<Integer> pageNumberList;

    /** The number of records per page. */
    private int pageSize;

     * Total number of pages.
     */
    private int allPageCount;

    /**
     * Flag indicating whether a previous page exists.
     */
    private boolean existPrePage;

    /**
     * Flag indicating whether a next page exists.
     */
    private boolean existNextPage;

    /**
     * List of page numbers for pagination navigation.
     */
    private List<Integer> pageNumberList;

    /**