code: def setup_method(self):
      if not hasattr(self, "data_generator"):
          self.data_generator = HeisenbergVectorsRandomDataGenerator(
              self.space
          )
  
file_path: geomstats/geomstats/test_cases/geometry/heisenberg.py
imports: import pytest
  from geomstats.test.random import HeisenbergVectorsRandomDataGenerator
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.base import VectorSpaceTestCase
  from geomstats.test_cases.geometry.lie_group import LieGroupTestCase
label_desc: Use image node_id 1 for calling the HeisenbergVectorsTestCase obj's underlying member method code with example usage: obj.setup_method() without return types