code: def exp_domain_vec_test_data(self):
      return self.generate_vec_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 HPDEuclideanMetricTestData obj's underlying member method code with example usage: obj.exp_domain_vec_test_data() and returns: self