code: def logs_at_mean_test_data(self):
      return self.generate_tests([{}])
  
imports: import random
  import geomstats.backend
  from geomstats.test.data import TestData
  from ._base import BaseEstimatorTestData, MeanEstimatorMixinsTestData
label_desc: Use image node_id 1 for calling the FrechetMeanTestData obj's underlying member method code with example usage: obj.logs_at_mean_test_data() and returns: self