code: def __call__(self, key, value):
      if value is None:
          value = self.target[key]
      elif isinstance(value, numpy.ndarray):
          numpy.copyto(value, self.target[key])
      else:
          value = type(value)(numpy.asarray(self.target[key]))
      return value
  
imports: import numpy
  import platform
  import pytest
  import unittest
  import chainer
  import chainer.testing
  import chainermn
label_desc: Use image node_id 3 for calling the DummyDeserializer obj's underlying member method code with example usage: obj.__call__(key, value) and returns: value