def _package_result(self, strategy: "SupervisedTemplate") -> "MetricResult":
        """Packages the metric result.

        :param strategy: The strategy object associated with the stream.
        :return: The metric result. As a MetricValue object.
        """
        metric_value = self.result(strategy)
        plot_x_position = strategy.clock.train_iterations
        metric_name = "EvalStream/Acc_Matrix"

        return [MetricValue(self, metric_name, metric_value, plot_x_position)]
Packages the metric result.

        :param strategy: The strategy object associated with the stream.
        :return: The metric result. As a MetricValue object.
        
avalanche/evaluation/metrics/acc_matrix.py