code: private boolean skipBar(Row row)
     {
        List<Row> childRows = row.getChildRows();
        return childRows.size() == 1 && childRows.get(0).getChildRows().isEmpty();
     }
docs: Returns true if we should skip this bar, i.e. the bar only has a single child task.
  
  @param row bar row to test
  @return true if this bar should be skipped