@Override
 protected boolean doCommand(final AutoResizeColumnsCommand command) {
   for (final int columnPosition : command.getColumnPositions()) {
     fDataLayer.setColumnWidthToAutoWidth(columnPosition);
   }
   return true;
 }
 @Override
 protected boolean doCommand(final MultiColumnResizeCommand command) {
   for (final IValueIterator posIter = new ValueIterator(command.getPositions());
       posIter.hasNext(); ) {
     final long position = posIter.nextValue();
     fDataLayer.setColumnWidth(position, command.getColumnWidth(position));
   }
   return true;
 }