class_docstr: A base class of unified devices.
  
  Chainer has the following concrete implementations:
  
  - :class:`chainer.backend.CpuDevice`
  - :class:`chainer.backend.GpuDevice`
  - :class:`chainer.backend.Intel64Device`
  - :class:`chainer.backend.ChainerxDevice`
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docstr: Returns a context manager in which the device is made current.
  
  .. seealso::
      :meth:`chainer.using_device` calls this method internally.
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code: def create_context(self):
      """Returns a context manager in which the device is made current.
  
      .. seealso::
          :meth:`chainer.using_device` calls this method internally.
      """
      return _dummy_context
  
label_desc: Use image node_id 10 for calling the Device obj's underlying member method code with example usage: obj.create_context() and returns: _dummy_context