code: def ptr(self):
      return self.memory.ptr
  
imports: import ctypes
  import mpi4py.MPI
  import numpy
  from chainermn.communicators import _communication_utility
  import chainer.backends
  import chainerx
label_desc: Use image node_id 5 for calling the DeviceMemory obj's underlying member method code with example usage: obj.ptr() and returns: self