code: def test_generate_samples(self):
      samples = self.small_model_lisrel.generate_samples(n_samples=100)
      samples = self.demo_lisrel.generate_samples(n_samples=100)
  
imports: import os
  import unittest
  import networkx
  import numpy
  import numpy.testing
  from pgmpy.models import SEM, SEMAlg, SEMGraph
label_desc: Use image node_id 2 for calling the TestSEMAlg obj's underlying member method code with example usage: obj.test_generate_samples() without return types