code: def sectional_curvature_lower_bound_test_data(self):
      return self.generate_random_data()
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .dirichlet import DirichletDistributionsTestData, DirichletMetricTestData
label_desc: Use image node_id 5 for calling the BetaMetricTestData obj's underlying member method code with example usage: obj.sectional_curvature_lower_bound_test_data() and returns: self