code: def test_to_dict_metric_instance(self):
      metric = metrics.Metric("test")
      out = metrics.to_dict(metric)
      self.assertTrue(out.metric.name == "test")
      self.assertTrue(isinstance(out, metrics.ToDict))
  
imports: import unittest
  from mock import Mock
  import torchbearer.metrics
  from torchbearer.metrics import default_for_key, lambda_metric, EpochLambda, BatchLambda
label_desc: Use image node_id 7 for calling the TestDecorators obj's underlying member method code with example usage: obj.test_to_dict_metric_instance() without return types