code: def immersion(self, point):
      return gs.hstack([gs.cos(point), gs.sin(point)])
  
imports: import geomstats.backend
  from geomstats.geometry.base import ImmersedSet
  from geomstats.geometry.euclidean import Euclidean
  from geomstats.geometry.invariant_metric import BiInvariantMetric
  from geomstats.geometry.pullback_metric import PullbackDiffeoMetric
  from geomstats.test_cases.geometry.diffeo import CircleSO2Diffeo
  from geomstats.test_cases.geometry.riemannian_metric import RiemannianMetricTestCase
label_desc: Use image node_id 2 for calling the CircleIntrinsic obj's underlying member method code with example usage: obj.immersion(point) and returns: gs