code: def distributions(request):
      space, mean, cov = request.param
  
      request.cls.distribution = LogNormal(
          space,
          mean,
          cov,
      )
      request.cls.mean_estimator = FrechetMean(space)
  
file_path: geomstats/tests/tests_geomstats/test_distributions/test_lognormal.py
imports: import pytest
  import geomstats.backend
  from geomstats.distributions.lognormal import LogNormal
  from geomstats.geometry.euclidean import Euclidean
  from geomstats.geometry.spd_matrices import SPDLogEuclideanMetric, SPDMatrices
  from geomstats.learning.frechet_mean import FrechetMean
  from geomstats.test.parametrizers import DataBasedParametrizer
  from geomstats.test_cases.distributions.lognormal import LogNormalTestCase
  from .data.lognormal import LogNormalTestData
label_desc: Use image node_id 1 for calling a global function with example usage: distributions(request) without return types