code: def test_same_squad(self):
      ref = "this is a string"
      self.assertDictClose(
          metrics.squad([["", ref], [ref, ref]], [ref, ref]),
          {
              "em": 100,
              "f1": 100,
          },
      )
  
imports: from unittest import mock
  from absl.testing import absltest
  import numpy
  import seqio
  import sklearn.metrics
  from t5.evaluation import metrics
  from t5.evaluation import test_utils
label_desc: Use image node_id 6 for calling the MetricsTest obj's underlying member method code with example usage: obj.test_same_squad() without return types