code: def test_builtin_vectors(self):
      output = example_test.run_example(
          "custom_struct/builtin_vectors.py"
      )
      assert re.match(
          r"Kernel output matches expected value.",
          output.decode("utf-8"),
      )
  
imports: import re
  import unittest
  from example_tests import example_test
label_desc: Use image node_id 1 for calling the TestCustomStruct obj's underlying member method code with example usage: obj.test_builtin_vectors() without return types