class_docstr: A chainer.Link that returns constant value(s).
  
  This is a :obj:`chainer.Link` that returns constant
  :obj:`chainer.Variable` (s) when :meth:`forward` method is called.
  
  Args:
      outputs (~numpy.ndarray or tuple or ~numpy.ndarray):
          The value(s) of variable(s) returned by :meth:`forward`.
          If an array is specified, :meth:`forward` returns
          a :obj:`chainer.Variable`. Otherwise, it returns a tuple of
          :obj:`chainer.Variable`.
code: def to_gpu(self, device=None):
      super(ConstantStubLink, self).to_gpu(device)
      for output in self._outputs:
          output.to_gpu(device)
  
file_path: chainercv/chainercv/utils/testing/constant_stub_link.py
imports: import numpy
  import chainer
label_desc: Use image node_id 3 for calling the ConstantStubLink obj's underlying member method code with example usage: obj.to_gpu(device) without return types