class_docstr: The Forward Transfer computed on each experience separately.
  The transfer is computed based on the accuracy metric.
class_docstr_tok: ["The","Forward","Transfer","computed","on","each","experience","separately",".","The","transfer","is","computed","based","on","the","accuracy","metric","."]
code: def metric_result(self, strategy):
      return self._current_metric.result(0)[0]
  
imports: from abc import ABC, abstractmethod
  from typing import Dict, TYPE_CHECKING, Generic, List, Optional, TypeVar, Union
  from avalanche.evaluation.metric_definitions import Metric, PluginMetric
  from avalanche.evaluation.metric_results import MetricValue, MetricResult
  from avalanche.evaluation.metrics import TaskAwareAccuracy, Mean
  from avalanche.evaluation.metric_utils import get_metric_name, phase_and_task, stream_type
label_desc: Use image node_id 5 for calling the ExperienceForwardTransfer obj's underlying member method code with example usage: obj.metric_result(strategy) and returns: self