code: def test_to_networkx(self, point):
      self.assertTrue(type(point.to_networkx()), nx.classes.graph.Graph)
  
imports: import networkx
  import pytest
  import geomstats.backend
  from geomstats.test.parametrizers import DataBasedParametrizer
  from geomstats.test.test_case import TestCase
  from geomstats.test_cases.geometry.stratified.point_set import PointSetMetricTestCase, PointSetTestCase, PointTestCase
  from .data.graph_space import AlignerTestData, DecoratorsTestData, GraphSpaceMetricTestData, GraphSpaceTestData, GraphTestData, PointToGeodesicAlignerTestData
label_desc: Use image node_id 1 for calling the TestGraphPoint obj's underlying member method code with example usage: obj.test_to_networkx(point) without return types