code: def belongs_test_data(self):
      smoke_data = [
          dict(
              point=gs.array([[3.0, -1.0], [-1.0, 3.0]]), expected=True
          ),
          dict(
              point=gs.array([[3j, -1.0], [-1.0, 3.0]]), expected=False
          ),
          dict(
              point=gs.array([[1.0, 1.0], [2.0, 1.0]]), expected=False
          ),
          dict(
              point=gs.array(
                  [[[1.0, 0.0], [0.0, 1.0]], [[1.0, -1.0], [0.0, 1.0]]]
              ),
              expected=[True, False],
          ),
      ]
      return self.generate_tests(smoke_data)
  
imports: import geomstats.backend
  from geomstats.test.data import TestData
  from .complex_matrices import ComplexMatricesMetricTestData
  from .complex_riemannian_metric import ComplexRiemannianMetricTestData
  from .pullback_metric import PullbackDiffeoMetricTestData
label_desc: Use image node_id 1 for calling the HPDMatrices2TestData obj's underlying member method code with example usage: obj.belongs_test_data() and returns: self