code: def test_mcse_array(self, mcse_method):
      if mcse_method == "quantile":
          mcse_hat = mcse(
              np.random.randn(4, 100), method=mcse_method, prob=0.34
          )
      else:
          mcse_hat = mcse(np.random.randn(4, 100), method=mcse_method)
      assert mcse_hat
  
imports: import os
  import numpy
  import packaging
  import pandas
  import pytest
  import scipy
  from numpy.testing import assert_almost_equal
  from ...data import from_cmdstan, load_arviz_data
  from ...rcparams import rcParams
  from ...sel_utils import xarray_var_iter
  from ...stats import bfmi, ess, mcse, rhat
  from ...stats.diagnostics import _ess, _ess_quantile, _mc_error, _mcse_quantile, _multichain_statistics, _rhat, _rhat_rank, _split_chains, _z_scale, ks_summary
label_desc: Use image node_id 20 for calling the TestDiagnostics obj's underlying member method code with example usage: obj.test_mcse_array(mcse_method) without return types