code: def exp_from_identity_test_data(self):
      data = [
          dict(
              tangent_vec=elements_all["translation_small"],
              expected=elements_all["translation_small"],
          ),
          dict(
              tangent_vec=gs.stack(
                  [elements_all["translation_small"]] * 2
              ),
              expected=gs.stack(
                  [elements_all["translation_small"]] * 2
              ),
          ),
      ]
      return self.generate_tests(data)
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .base import LevelSetTestData
  from .invariant_metric import InvariantMetricMatrixTestData
  from .lie_group import LieGroupTestData, MatrixLieGroupTestData
  from .mixins import ProjectionMixinsTestData
label_desc: Use image node_id 3 for calling the SpecialEuclidean2VectorsTestData obj's underlying member method code with example usage: obj.exp_from_identity_test_data() and returns: self