code: def accuracy_matrix_metrics() -> List[PluginMetric]:
      """
      Helper method that can be used to obtain the desired set of
      plugin metrics.
  
      :return: A list of plugin metrics.
      """
  
      metrics = []
      metrics.append(AccuracyMatrixPluginMetric())
  
      return metrics
  
file_path: avalanche/avalanche/evaluation/metrics/acc_matrix.py
imports: import torch
  from typing import List
  from avalanche.evaluation import PluginMetric
  from avalanche.evaluation.metric_results import MetricValue, MetricResult
  from avalanche.evaluation.metrics.accuracy import Accuracy
  from avalanche.training.templates import SupervisedTemplate
label_desc: Use image node_id 1 for calling a global function with example usage: accuracy_matrix_metrics() and returns: metrics