def to_list(self):
        """Convert this confusion matrix into a 2x2 plain list of values."""
        return [[int(self.table.cell_values[0][1]), int(self.table.cell_values[0][2])],
                [int(self.table.cell_values[1][1]), int(self.table.cell_values[1][2])]]
Convert this confusion matrix into a 2x2 plain list of values.