code: def testCounterMetricIncrements(self):
      counter = py_metrics.CounterMetric()
  
      self.assertEqual(0, counter.result())
      counter()
      self.assertEqual(1, counter.result())
      counter()
      self.assertEqual(2, counter.result())
      counter.reset()
      self.assertEqual(0, counter.result())
      counter()
      self.assertEqual(1, counter.result())
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tf_agents.metrics import py_metrics
  from tf_agents.trajectories import time_step
  from tf_agents.trajectories import trajectory
  from tf_agents.utils import nest_utils
label_desc: Use image node_id 9 for calling the PyMetricsTest obj's underlying member method code with example usage: obj.testCounterMetricIncrements() without return types