code: def directional_curvature_derivative_random_test_data(self):
      return self.generate_random_data()
  
imports: from geomstats.test.data import TestData
label_desc: Use image node_id 9 for calling the ConnectionComparisonTestData obj's underlying member method code with example usage: obj.directional_curvature_derivative_random_test_data() and returns: self