code: def __init__(self, metric):
      super().__init__()
      self.metric = metric
  
imports: import unittest
  import torch
  import torch.nn
  from poutyne import Callback, EarlyStopping, Metric, Model
  from tests.framework.base import CaptureOutputBase
  from tests.framework.tools import some_data_generator
label_desc: Use image node_id 1 to create a new DummyMetricCallback object from inherited base classes: Callback with example: obj = DummyMetricCallback(metric)