code: def output_size(self):
      return self._num_units
  
file_path: nni/examples/trials/weight_sharing/ga_squad/rnn.py
imports: import tensorflow
  from tensorflow.python.ops.rnn_cell_impl import RNNCell
label_desc: Use image node_id 3 for calling the XGRUCell obj's underlying member method code with example usage: obj.output_size() and returns: self