code: def test_laplace():
      """
      Tests an GASX model estimated with Laplace approximation, and tests that the latent variable
      vector length is correct, and that value are not nan
      """
      model = pf.GASX(
          formula="y ~ x1", data=data, ar=1, sc=1, family=pf.Laplace()
      )
      x = model.fit("Laplace")
      assert len(model.latent_variables.z_list) == 5
      lvs = np.array([i.value for i in model.latent_variables.z_list])
      assert len(lvs[np.isnan(lvs)]) == 0
  
imports: import numpy
  import pandas
  import pyflux
label_desc: Use image node_id 9 for calling a global function with example usage: test_laplace() without return types