code: def _logm_expm_data(self, func_name="linalg.logm"):
      arrays = [
          Matrices.to_diagonal(rand(3, 3)),
          # TODO: uncomment or delete?
          # Matrices.to_symmetric(rand(3, 3)),
          # rand(3, 3),
      ]
      return [dict(func_name=func_name, a=array) for array in arrays]
  
imports: import geomstats.backend
  from geomstats.geometry.matrices import Matrices
  from geomstats.test.data import TestData
label_desc: Use image node_id 1 for calling the AgainstScipyTestData obj's underlying member method code with example usage: obj._logm_expm_data(func_name) and returns: unknown