code: def estimators(request):
      space = request.param
      request.cls.estimator = IncrementalFrechetMean(space)
  
file_path: geomstats/tests/tests_geomstats/test_learning/test_incremental_frechet_mean.py
imports: import random
  import pytest
  import geomstats.backend
  from geomstats.geometry.euclidean import Euclidean
  from geomstats.geometry.spd_matrices import SPDAffineMetric, SPDLogEuclideanMetric, SPDMatrices
  from geomstats.learning.incremental_frechet_mean import IncrementalFrechetMean
  from geomstats.test.parametrizers import DataBasedParametrizer
  from geomstats.test_cases.learning.incremental_frechet_mean import IncrementalFrechetMeanTestCase
  from .data.incremental_frechet_mean import IncrementalFrechetMeanEuclideanTestData, IncrementalFrechetMeanTestData
label_desc: Use image node_id 1 for calling a global function with example usage: estimators(request) without return types