code: def leaf(self, x):
      return self.embed(x)
  
imports: import argparse
  import collections
  import warnings
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  import chainer.links
  from chainer import optimizers
  from chainer import reporter
  from chainer.training import extensions
  import data
label_desc: Use image node_id 3 for calling the RecursiveNet obj's underlying member method code with example usage: obj.leaf(x) and returns: self