public void setChecked(Production production, boolean checked) {
		Integer r = (Integer) productionToRow.get(production);
		if (r == null)
			return;
		int row = r.intValue();
		Boolean b = checked ? Boolean.TRUE : Boolean.FALSE;
		data[row][1] = b;
		((DefaultTableModel) getModel()).setValueAt(b, row, 1);
	}