@Override
  public int size() {
    return row == null ? 0 : 1;
  }
@Test
  public void testSize() throws Exception {
    assertEquals( 0, rowSet.size() );
    rowSet.putRow( new RowMeta(), row );
    assertEquals( 1, rowSet.size() );
    rowSet.clear();
    assertEquals( 0, rowSet.size() );
  }