code: def test_graphviz(self):
      # just make sure everything runs without error
  
      g = self.model_graph.make_graph()
      for key in self.compute_graph:
          assert key in g.source
      g = model_to_graphviz(self.model)
      for key in self.compute_graph:
          assert key in g.source
  
imports: import warnings
  import numpy
  import pytensor
  import pytensor.tensor
  import pytest
  from pytensor.compile.sharedvalue import SharedVariable
  from pytensor.tensor.variable import TensorConstant
  import pymc
  from pymc.exceptions import ImputationWarning
  from pymc.model_graph import ModelGraph, model_to_graphviz, model_to_networkx
label_desc: Use image node_id 5 for calling the BaseModelGraphTest obj's underlying member method code with example usage: obj.test_graphviz() without return types