code: def get_model_select_metric(self, metric: SquadMetrics):
      return metric.f1_score
  
imports: import re
  import string
  from typing import Dict, List, Set, Tuple, Union
  import numpy
  from pytext.common.constants import Stage
  from pytext.metric_reporters.channel import Channel, ConsoleChannel, FileChannel
  from pytext.metric_reporters.metric_reporter import MetricReporter
  from pytext.metrics.squad_metrics import SquadMetrics
  from pytext.utils.data import merge_token_labels_to_slot, parse_slot_string, Slot
  from scipy.optimize import linear_sum_assignment
label_desc: Use image node_id 10 for calling the MultiSpanQAMetricReporter obj's underlying member method code with example usage: obj.get_model_select_metric(metric) and returns: metric