code: def testGetSetName(self):
      name = MPI.DATATYPE_NULL.Get_name()
      self.assertEqual(name, "MPI_DATATYPE_NULL")
      for dtype in datatypes:
          try:
              name = dtype.Get_name()
              self.assertTrue(name)
              dtype.Set_name(name)
              self.assertEqual(name, dtype.Get_name())
              dtype.name = dtype.name
          except NotImplementedError:
              self.skipTest("mpi-type-name")
  
imports: from mpi4py import MPI
  import mpiunittest
  import struct
label_desc: Use image node_id 8 for calling the TestDatatype obj's underlying member method code with example usage: obj.testGetSetName() without return types