code: def test_multiclass_f1(self):
      self.assertDictClose(
          metrics.mean_multiclass_f1(num_classes=3)(
              [0, 1, 1, 2], [0, 0, 2, 2]
          ),
          {"mean_3class_f1": 44.44444444444444},
      )
  
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 15 for calling the MetricsTest obj's underlying member method code with example usage: obj.test_multiclass_f1() without return types