code: def _in_channel_size(self):
      return self._channel_size(self.in_channels)
  
imports: from __future__ import print_function
  import chainer
  import chainer.functions
  import chainer.links
  import chainermn.functions
  import numpy
label_desc: Use image node_id 3 for calling the ParallelConvolution2D obj's underlying member method code with example usage: obj._in_channel_size() and returns: self