code: def test_process_final(self):
      result = self._metric.process_final(self._state)
      self.assertEqual(101, result)
  
imports: import unittest
  import torch
  from torch.autograd import Variable
  import torchbearer
  from torchbearer.metrics import Loss, Epoch, CategoricalAccuracy, TopKCategoricalAccuracy, BinaryAccuracy, MeanSquaredError
label_desc: Use image node_id 3 for calling the TestEpoch obj's underlying member method code with example usage: obj.test_process_final() without return types