docs: @Override
  	public Class<?> getColumnClass(int columnIndex) {
  		switch (columnIndex) {
  		case 0:
  			return Boolean.class;
  		case 1:
  			return String.class;
  		case 2:
  			return String.class;
  		case 3:
  			return Integer.class;
  		}
  		return null;
  	}