* {@link #iterator}, you may wish to override {@link #toString} to forward to this
   * implementation.
   *
   * @since 7.0
   */
  protected String standardToString() {
    return Collections2.toStringImpl(this);
  }

  /**
   * A sensible definition of {@link #toArray()} in terms of {@link #toArray(Object[])}. If you
   * override {@link #toArray(Object[])}, you may wish to override {@link #toArray} to forward to

   * {@link #iterator}, you may wish to override {@link #toString} to forward to this
   * implementation.
   *
   * @since 7.0
   */
  protected String standardToString() {
    return Collections2.toStringImpl(this);
  }

  /**
   * A sensible definition of {@link #toArray()} in terms of {@link #toArray(Object[])}. If you
   * override {@link #toArray(Object[])}, you may wish to override {@link #toArray} to forward to