code: def test_water_model(self):
      model = self.water_model.get_model()
      self.assertEqual(len(model.nodes()), 32)
      self.assertEqual(len(model.edges()), 66)
      self.assertEqual(len(model.get_cpds()), 32)
  
imports: import os
  import unittest
  import networkx
  import numpy
  import numpy.testing
  from pgmpy import config
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
  from pgmpy.readwrite import BIFReader, BIFWriter
label_desc: Use image node_id 11 for calling the TestBIFReaderTorch obj's underlying member method code with example usage: obj.test_water_model() without return types