code: def test_couple_terms():
      """
      Tests the length of the latent variable vector for an GASX model
      with 1 AR and 1 SC term, and tests that the values are not nan
      """
      assert len(model_2.latent_variables.z_list) == 6
      lvs = np.array([i.value for i in model_2.latent_variables.z_list])
      assert len(lvs[np.isnan(lvs)]) == 0
  
imports: import numpy
  import pandas
  import pyflux
label_desc: Use image node_id 2 for calling a global function with example usage: test_couple_terms() without return types