code: def _expected_inverse_circle_metric_matrix(point):
      mat = gs.array([[1.0]])
      return mat
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .riemannian_metric import RiemannianMetricComparisonTestData, RiemannianMetricTestData
label_desc: Use image node_id 6 for calling a global function with example usage: _expected_inverse_circle_metric_matrix(point) and returns: mat