code: def link_wrapper(self, *data):
      return self.link(
          x=data[0], train=True, mask=data[1], use_batchwise_mask=True
      )
  
imports: import os
  import tempfile
  import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer.serializers import npz
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 5 for calling the TestSimplifiedDropconnectParameterShapePlaceholder obj's underlying member method code with example usage: obj.link_wrapper() and returns: self