code: def testMergeDifferentNames(self):
      counter_1 = statistics.Counter("counter_1")
      counter_2 = statistics.Counter("counter_2")
      with self.assertRaises(statistics.MergeStatisticsError):
          counter_1.merge_from(counter_2)
  
imports: from absl.testing import absltest
  from magenta.pipelines import statistics
label_desc: Use image node_id 3 for calling the StatisticsTest obj's underlying member method code with example usage: obj.testMergeDifferentNames() without return types