docs: public static void pruneDenseTableColumnsV3(List<RawColumn> columns) {
      ListIterator<RawColumn> iterator = columns.listIterator();
      while (iterator.hasNext()) {
        RawColumn column = iterator.next();
        if (column.kind.equals(KIND_REGULAR) && "empty".equals(column.dataType)) {
          iterator.remove();
        }
      }
    }