code: def testName(self):
      preprocessor = set_match_preprocessors.SetMatchPreprocessor(
          class_key="",
          weight_key="",
          prediction_class_key="classes",
          prediction_score_key="scores",
          top_k=3,
      )
      self.assertEqual(
          preprocessor.name, "_set_match_preprocessor:top_k=3"
      )
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  import apache_beam
  from apache_beam.testing import util
  import numpy
  from tensorflow_model_analysis import constants
  from tensorflow_model_analysis.metrics.preprocessors import set_match_preprocessors
  from tensorflow_model_analysis.utils import util
label_desc: Use image node_id 2 for calling the SetMatchPreprocessorTest obj's underlying member method code with example usage: obj.testName() without return types