public TableCellRenderer getCellRenderer(int row, int column) {
		int column2 = convertColumnIndexToModel(column);
		if (highlightRenderers != null) {
			TableCellRenderer ren = (TableCellRenderer) highlightRenderers
					.get(new Integer(singleIndex(row, column2)));
			if (ren != null)
				return ren;
		}
		return super.getCellRenderer(row, column);
	}