code: def test_exp_from_identity_vec(self, n_reps, atol):
      tangent_vec = self.data_generator.random_tangent_vec(
          self.space.identity
      )
      expected = self.space.exp_from_identity(tangent_vec)
  
      vec_data = generate_vectorization_data(
          data=[
              dict(
                  tangent_vec=tangent_vec, expected=expected, atol=atol
              )
          ],
          arg_names=["tangent_vec"],
          expected_name="expected",
          n_reps=n_reps,
      )
      self._test_vectorization(vec_data)
  
imports: import pytest
  import geomstats.backend
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.manifold import ManifoldTestCase
  from geomstats.test_cases.geometry.mixins import GroupExpTestCaseMixins
  from geomstats.vectorization import repeat_point
label_desc: Use image node_id 4 for calling the LieGroupTestCase obj's underlying member method code with example usage: obj.test_exp_from_identity_vec(n_reps, atol) without return types