code: def test_get_example_model(self):
      all_models = [
          "asia",
          "cancer",
          "earthquake",
          "sachs",
          "survey",
          "alarm",
          "barley",
          "child",
          "insurance",
          "mildew",
          "water",
          "hailfinder",
          "hepar2",
          "win95pts",
          "andes",
          "diabetes",
          "link",
          "munin1",
          "munin2",
          "munin3",
          "munin4",
          "pathfinder",
          "pigs",
          "munin",
      ]
      # Would take too much time to load all the models. Hence, randomly select
      # 5 and try to load them.
      choices = random.choices(all_models, k=5)
      for model in tqdm(choices):
          m = get_example_model(model=model)
          del m
  
imports: import unittest
  import random
  from tqdm.auto import tqdm
  from pgmpy.utils import get_example_model
label_desc: Use image node_id 1 for calling the TestDAGCreation obj's underlying member method code with example usage: obj.test_get_example_model() without return types