code: def __init__(self, x_size, h_size):
      super(TreeLSTMCell, self).__init__(h_size)
      self._reduce_func = _TreeLSTMCellReduceFunc(
          gluon.nn.Dense(3 * h_size, use_bias=False),
          gluon.nn.Dense(2 * h_size),
      )
      self.W_iou = gluon.nn.Dense(3 * h_size, use_bias=False)
  
imports: import itertools
  import time
  import dgl
  import mxnet
  import networkx
  import numpy
  from mxnet import gluon
label_desc: Use image node_id 1 to create a new TreeLSTMCell object from inherited base classes: _TreeLSTMCell with example: obj = TreeLSTMCell(x_size, h_size)