code: def data(self, eight_schools_params, draws, chains):
      class Data:
          # chains are not used
          # emcee uses lots of walkers
          obj = load_cached_models(
              eight_schools_params, draws, chains, "emcee"
          )["emcee"]
  
      return Data
  
imports: import os
  import numpy
  import pytest
  from ...None import from_emcee
  from ..helpers import _emcee_lnprior
  from ..helpers import _emcee_lnprob
  from ..helpers import chains, check_multiple_attrs, draws, eight_schools_params, importorskip, load_cached_models, needs_emcee3_func
label_desc: Use image node_id 1 for calling the TestDataEmcee obj's underlying member method code with example usage: obj.data(eight_schools_params, draws, chains) and returns: Data