code: def test_getitem(self):
      d = self.reference
      self.assertEqual(
          d[list(self.inmapping.keys())[0]],
          list(self.inmapping.values())[0],
      )
  
      self.assertRaises(TypeError, d.__getitem__)
  
imports: import unittest
  import collections
  from test.support import Py_C_RECURSION_LIMIT
label_desc: Use image node_id 13 for calling the BasicTestMappingProtocol obj's underlying member method code with example usage: obj.test_getitem() without return types