code: def result(self):
      return self.value
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tempfile
  import tensorflow
  from tf_agents.metrics import py_metric
label_desc: Use image node_id 3 for calling the DummyMetric obj's underlying member method code with example usage: obj.result() and returns: self