@Override
 public int hashCode() {
   int hash = tableColumn.hashCode();
   hash = hash * 37 + width;
   hash = hash * 37 + (subcolumns == null ? 0 : subcolumns.hashCode());
   return hash;
 }
 public FillColumn(BaseColumn tableColumn) {
   this(tableColumn, tableColumn.getWidth(), null);
 }