code: def test_model(self):
      a, b = transition(measure="lagt", n=2)
      self.assertEqual(a.shape, (2, 2))
      self.assertEqual(b.shape, (2, 1))
  
imports: import unittest
  import torch
  from towhee.models.vis4mer.utils import transition
label_desc: Use image node_id 1 for calling the TransitionTest obj's underlying member method code with example usage: obj.test_model() without return types