code: def test_identity(self, expected, atol):
      self.assertAllClose(self.space.identity, expected, atol=atol)
  
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 17 for calling the _LieGroupTestCaseMixins obj's underlying member method code with example usage: obj.test_identity(expected, atol) without return types