code: def setUp(self):
      if self.model_type == "ChildSumTreeLSTM":
          self.link = links.ChildSumTreeLSTM(
              self.in_size, self.out_size
          )
      elif self.model_type == "NaryTreeLSTM":
          if self.n_ary == 0:
              # n_ary=0 test should be skipped for NaryTreeLSTM
              self.n_ary = 1
          self.link = links.NaryTreeLSTM(
              self.in_size, self.out_size, n_ary=self.n_ary
          )
      else:
          NotImplementedError()
  
      for p in self.link.params():
          p.data[:] = numpy.random.uniform(-1, 1, p.shape).astype(
              self.dtype
          )
  
      self.c_prevs = [
          numpy.random.uniform(-1, 1, (5, self.out_size)).astype(
              self.dtype
          )
          for _ in range(self.n_ary)
      ]
      self.h_prevs = [
          numpy.random.uniform(-1, 1, (5, self.out_size)).astype(
              self.dtype
          )
          for _ in range(self.n_ary)
      ]
      self.x = numpy.random.uniform(-1, 1, (5, self.in_size)).astype(
          self.dtype
      )
      self.inputs = self.c_prevs + self.h_prevs + [self.x]
  
      self.gc = numpy.random.uniform(-1, 1, (5, self.out_size)).astype(
          self.dtype
      )
      self.gh = numpy.random.uniform(-1, 1, (5, self.out_size)).astype(
          self.dtype
      )
  
      self.check_forward_options = {}
      self.check_backward_options = {"dtype": numpy.float64}
      if self.dtype == numpy.float16:
          self.check_forward_options = {"atol": 5e-4, "rtol": 5e-3}
          self.check_backward_options = {
              "dtype": numpy.float64,
              "atol": 5e-4,
              "rtol": 5e-3,
          }
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
label_desc: Use image node_id 1 for calling the TestTreeLSTM obj's underlying member method code with example usage: obj.setUp() without return types