}
      return iterator.next();
    }

    @Override
    public void remove() {
      iterator.remove();
    }
  }

  public void testPeekingIteratorDoesntAdvancePrematurely() throws Exception {
    /*
     * This test will catch problems where the underlying iterator
     * throws a RuntimeException when retrieving the nth element.
     *

      }
      return iterator.next();
    }

    @Override
    public void remove() {
      iterator.remove();
    }
  }

  public void testPeekingIteratorDoesntAdvancePrematurely() throws Exception {
    /*
     * This test will catch problems where the underlying iterator
     * throws a RuntimeException when retrieving the nth element.
     *