/**
  * Returns the renderer for a cell specified by row and column.
  *
  * @param row the row number
  * @param column the column number
  * @return the cell renderer
  */
 public TableCellRenderer getCellRenderer(int row, int column) {
   int i = dataTable.convertColumnIndexToModel(column);
   if (i == 0) return labelRenderer;
   return getDefaultRenderer(tableModel.getValueAt(row, column).getClass());
 }