code: def test_SM_increment_read(self):
      self.assertEqual(metrics.GetRead(write_version="2"), 0)
      metrics.IncrementReadApi("bar")
      self.assertEqual(metrics.GetReadApi("bar"), 1)
      metrics.IncrementRead(write_version="2")
      self.assertEqual(metrics.GetRead(write_version="2"), 1)
  
imports: import os
  from tensorflow.core.framework import summary_pb2
  from tensorflow.core.framework import versions_pb2
  from tensorflow.core.protobuf import fingerprint_pb2
  from tensorflow.python.eager import test
  from tensorflow.python.saved_model.pywrap_saved_model import metrics
label_desc: Use image node_id 4 for calling the MetricsTest obj's underlying member method code with example usage: obj.test_SM_increment_read() without return types