@Override
    public Object getValueAt(int row, int col) {
      Variable variable = myVariables.get(row);
      if (col == 0) {
        return variable.getName();
      }
      if (col == 1) {
        return variable.getExpressionString();
      }
      if (col == 2) {
        return variable.getDefaultValueString();
      }
      else {
        return variable.isAlwaysStopAt() ? Boolean.FALSE : Boolean.TRUE;
      }
    }
@Override
    public Object getValueAt(int row, int col)