code: def testSubarray2(self):
      shapes = [
          (1,),
          (1, 1),
          (1, 1, 1),
          (3,),
          (3, 4),
          (2, 3, 4),
      ]
      orders = [MPI.ORDER_C, MPI.ORDER_FORTRAN]
      for mt, shape, order in itertools.product(
          datatypes, shapes, orders
      ):
          with self.subTest(name=mt.name, shape=shape, order=order):
              starts = (0,) * len(shape)
              mt1 = mt.Create_subarray(shape, shape, starts, order)
              self.check(mt1)
              mt1.Free()
  
imports: from mpi4py import MPI
  from mpi4py.util.dtlib import from_numpy_dtype
  from mpi4py.util.dtlib import to_numpy_dtype
  import sys, os
  import itertools
label_desc: Use image node_id 4 for calling the TestUtilDTLib obj's underlying member method code with example usage: obj.testSubarray2() without return types