code: def testSizeOf(self):
      for obj in self.objects:
          n1 = MPI._sizeof(obj)
          n2 = MPI._sizeof(type(obj))
          self.assertEqual(n1, n2)
      with self.assertRaises(TypeError):
          MPI._sizeof(None)
  
imports: from mpi4py import MPI
  import mpiunittest
  import ctypes
  import operator
  import weakref
  import sys
label_desc: Use image node_id 11 for calling the TestObjModel obj's underlying member method code with example usage: obj.testSizeOf() without return types