code: def setup_method(self):
      if self.space.n_copies != 1:
          raise ValueError("Test case works only for n_copies=1")
  
      if not hasattr(self, "data_generator"):
          self.data_generator = RandomDataGenerator(self.other_space)
  
file_path: geomstats/geomstats/test_cases/geometry/nfold_manifold.py
imports: import pytest
  import geomstats.backend
  from geomstats.test.random import NFoldManifoldRandomDataGenerator, RandomDataGenerator
  from geomstats.test.test_case import TestCase
  from geomstats.test_cases.geometry.manifold import ManifoldTestCase
  from geomstats.test_cases.geometry.mixins import ProjectionTestCaseMixins
  from geomstats.test_cases.geometry.riemannian_metric import RiemannianMetricTestCase
label_desc: Use image node_id 1 for calling the NFoldMetricScalesTestCase obj's underlying member method code with example usage: obj.setup_method() without return types