code: def test_dict_contains(self):
      self.run_test(
          "def dict_contains(v): return v in { 'a':1, 'e': 2 }",
          "e",
          dict_contains=[str],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import Dict, List
label_desc: Use image node_id 7 for calling the TestDict obj's underlying member method code with example usage: obj.test_dict_contains() without return types