code: def testResized(self):
      for dtype in datatypes:
          for lb in range(-10, 10):
              for extent in range(1, 10):
                  factory = MPI.Datatype.Create_resized
                  args = lb, extent
                  self.check(dtype, factory, *args)
  
imports: from mpi4py import MPI
  import mpiunittest
  import struct
label_desc: Use image node_id 20 for calling the BaseTestDatatypeCreateMixin obj's underlying member method code with example usage: obj.testResized() without return types