code: def testContiguous(self):
      for dtype in datatypes:
          for count in range(5):
              factory = MPI.Datatype.Create_contiguous
              args = (count,)
              self.check(dtype, factory, *args)
  
imports: from mpi4py import MPI
  import mpiunittest
  import struct
label_desc: Use image node_id 5 for calling the BaseTestDatatypeCreateMixin obj's underlying member method code with example usage: obj.testContiguous() without return types