code: def get_model_select_metric(metrics):
      return metrics.accuracy
  
file_path: pytext/demo/my_tagging/metric.py
imports: import itertools
  from pytext.metric_reporters.channel import ConsoleChannel, TensorBoardChannel
  from pytext.metric_reporters.metric_reporter import MetricReporter
  from pytext.metrics import compute_classification_metrics, LabelPrediction
label_desc: Use image node_id 5 for calling the MyTaggingMetricReporter obj's underlying member method code with example usage: obj.get_model_select_metric(metrics) and returns: metrics