code: def __init__(self, h_size):
      super(_TreeLSTMCell, self).__init__()
      self._apply_node_func = _TreeLSTMCellNodeFunc()
      self.b_iou = self.params.get(
          "bias", shape=(1, 3 * h_size), init="zeros"
      )
  
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: gluon with example: obj = _TreeLSTMCell(h_size)