code: def save(self, global_step=None):
      self.saver.save(
          self.sess, self.save_path, global_step=global_step
      )
  
imports: from ..meta_controller.base_controller import WiderActorNet, DeeperActorNet, EncoderNet, BaseController
  import tensorflow
  import os
  from tensorflow.python.ops import array_ops
  from ..models.basic_model import BasicModel
  import shutil
  import numpy
label_desc: Use image node_id 1 for calling the RLNet2NetController obj's underlying member method code with example usage: obj.save(global_step) without return types