/**
     * Index of element returned by most recent call to next. Reset to -1 if this element is deleted
     * by a call to remove.
     */
    private int lastRet;

    Itr() {
      lastRet = -1;
      if (count == 0) nextIndex = -1;
      else {
        nextIndex = takeIndex;
        nextItem = items[takeIndex];
      }
    }

    @Override

    /**
     * Index of element returned by most recent call to next. Reset to -1 if this element is deleted
     * by a call to remove.
     */
    private int lastRet;

    Itr() {
      lastRet = -1;
      if (count == 0) nextIndex = -1;
      else {
        nextIndex = takeIndex;
        nextItem = items[takeIndex];
      }
    }

    @Override