code: def test_is_super():
      t1 = MyType(1)
      t2 = MyType(2)
  
      assert t1.is_super(t2) is None
  
      t1_2 = MyType(1)
      assert t1.is_super(t1_2)
  
file_path: pytensor/tests/graph/test_types.py
imports: import pytest
  from pytensor.graph.basic import Variable
  from pytensor.graph.type import Type
label_desc: Use image node_id 1 for calling a global function with example usage: test_is_super() without return types