code: def test_ofg_nested(self):
      m = models.OfgNested()
      f = function(m.inputs, m.outputs)
      self.check(f)
  
file_path: pytensor/tests/d3viz/test_d3viz.py
imports: import filecmp
  import os.path
  import tempfile
  import numpy
  import pytest
  import pytensor.d3viz
  from pytensor import compile
  from pytensor.compile.function import function
  from pytensor.configdefaults import config
  from pytensor.printing import pydot_imported, pydot_imported_msg
  from tests.d3viz import models
label_desc: Use image node_id 6 for calling the TestD3Viz obj's underlying member method code with example usage: obj.test_ofg_nested() without return types