code: def tangent_vec_from_base_point_to_zero_vec_test_data(self):
      return self.generate_vec_data()
  
imports: import math
  import geomstats.backend
  from geomstats.test.data import TestData
  from .complex_riemannian_metric import ComplexRiemannianMetricTestData
label_desc: Use image node_id 1 for calling the SiegelMetricTestData obj's underlying member method code with example usage: obj.tangent_vec_from_base_point_to_zero_vec_test_data() and returns: self