code: def test_n_nureg():
      import brainiak.reprsimil.brsa
      import numpy as np
  
      noise = (
          np.dot(np.random.randn(100, 8), np.random.randn(8, 30))
          + np.random.randn(100, 30) * 0.001
      )
      design = np.random.randn(100, 2)
      s = brainiak.reprsimil.brsa.GBRSA(n_iter=2)
      s.fit(X=noise, design=design)
      assert s.n_nureg_[0] == 8, "n_nureg_ estimation is wrong in GBRSA"
  
label_desc: Use image node_id 5 for calling a global function with example usage: test_n_nureg() without return types