code: def test_combinations(self):
      p = ge.GEParser("Conv | (Conv[1x1] > Conv)")
      self.assertTrue(isinstance(p.parallel(), ge.ParallelPattern))
  
      p = ge.GEParser("Conv > (Conv [1x1] | Conv)")
      self.assertTrue(isinstance(p.serial(), ge.SerialPattern))
  
imports: import unittest
  import hiddenlayer
  import hiddenlayer.ge
  import hiddenlayer.transforms
label_desc: Use image node_id 4 for calling the TestGEParser obj's underlying member method code with example usage: obj.test_combinations() without return types