code: def test_squad_small(self):
      self.assertDictClose(
          metrics.squad([["abc abd", "$$$$"]], ["abd"]),
          {"f1": 100 * 2.0 / 3.0, "em": 0.0},
      )
  
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 9 for calling the MetricsTest obj's underlying member method code with example usage: obj.test_squad_small() without return types