class_docstr: Tangent bundle of a space.
class_docstr_tok: ["Tangent","bundle","of","a","space","."]
docstr: Metric to equip the space with if equip is True.
docstr_tok: ["Metric","to","equip","the","space","with","if","equip","is","True","."]
code: def default_metric():
      """Metric to equip the space with if equip is True."""
      return SasakiMetric
  
imports: from joblib import Parallel, delayed
  import geomstats.backend
  from geomstats.geometry.base import Manifold
  from geomstats.geometry.riemannian_metric import RiemannianMetric
  from geomstats.vectorization import check_is_batch
label_desc: Use image node_id 2 for calling the TangentBundle obj's underlying member method code with example usage: obj.default_metric() and returns: SasakiMetric