code: def _expected_circle_metric_second_fundamental_form(base_point):
      return gs.array(
          [
              [-gs.cos(base_point)],
              [-gs.sin(base_point)],
          ]
      )
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .riemannian_metric import RiemannianMetricComparisonTestData, RiemannianMetricTestData
label_desc: Use image node_id 8 for calling a global function with example usage: _expected_circle_metric_second_fundamental_form(base_point) and returns: gs