code: def save(self, save_dir, model_name):
      meta_path = os.path.join(save_dir, "meta", model_name)
      param_path = os.path.join(save_dir, "param", model_name)
      embed_path = os.path.join(save_dir, "embed", model_name)
      np.save(meta_path, self.params)
      self.pc_param.save(param_path)
      self.pc_embed.save(embed_path)
      return meta_path + ".npy"
  
file_path: dynet/examples/treelstm/model.py
imports: import dynet
  import numpy
  import os
label_desc: Use image node_id 6 for calling the TreeLSTMClassifier obj's underlying member method code with example usage: obj.save(save_dir, model_name) and returns: unknown