code: def fit_and_predict_test_data(self):
      return self._generate_test_data_from_generators(
          self.data_generators, "fit_and_predict_test_data"
      )
  
imports: import geomstats.backend
  from geomstats.geometry.stratified.graph_space import ExhaustiveAligner, GraphSpace, _GeodesicToPointAligner
  from geomstats.learning.aac import _AACGGPCA, _AACFrechetMean, _AACRegression
  from geomstats.test.data import TestData
  from geomstats.test.test_case import np_backend
label_desc: Use image node_id 2 for calling the AACRegressionTestData obj's underlying member method code with example usage: obj.fit_and_predict_test_data() and returns: self