code: def belongs_test_data(self):
      data = [
          dict(point=gs.array([0.1, 1.0, 0.3]), expected=False),
          dict(point=gs.array([0.1, 1.0]), expected=True),
          dict(point=gs.array([-1.0, 0.3]), expected=False),
      ]
      return self.generate_tests(data)
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .dirichlet import DirichletDistributionsTestData, DirichletMetricTestData
label_desc: Use image node_id 1 for calling the BetaDistributionsSmokeTestData obj's underlying member method code with example usage: obj.belongs_test_data() and returns: self