code: def test_getCount(self):
      self.assertEqual(self._confusion.get_count(0, 0), 4)
  
file_path: torch-points3d/test/test_confusionMatrix.py
imports: import os
  import sys
  import numpy
  import unittest
  import tempfile
  import h5py
  import numpy.testing
  import numpy.matlib
  from torch_points3d.metrics.confusion_matrix import ConfusionMatrix
label_desc: Use image node_id 2 for calling the TestConfusionMatrix obj's underlying member method code with example usage: obj.test_getCount() without return types