code: def setup_class(cls):
      cls.model, cls.compute_graph, cls.plates = cls.model_func()
      cls.model_graph = ModelGraph(cls.model)
  
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 1 for calling the BaseModelGraphTest obj's underlying member method code with example usage: obj.setup_class(cls) without return types