code: def setup_method(self):
      if not hasattr(self, "data_generator"):
          self.data_generator = LieGroupVectorRandomDataGenerator(
              self.space
          )
  
imports: import pytest
  import geomstats.backend
  from geomstats.geometry.euclidean import Euclidean
  from geomstats.geometry.general_linear import SquareMatrices
  from geomstats.geometry.special_euclidean import SpecialEuclidean, homogeneous_representation
  from geomstats.test.random import LieGroupVectorRandomDataGenerator
  from geomstats.test.test_case import assert_allclose
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.lie_group import LieGroupTestCase
  from geomstats.test_cases.geometry.mixins import ProjectionTestCaseMixins
label_desc: Use image node_id 1 for calling the SpecialEuclideanVectorsTestCase obj's underlying member method code with example usage: obj.setup_method() without return types