code: def main(cmd=None):
      """GAN-based SVS training
  
      Example:
  
          % python gan_svs_train.py --print_config --optim1 adadelta
          % python gan_svs_train.py --config conf/train.yaml
      """
      GANSVSTask.main(cmd=cmd)
  
label_desc: Use image node_id 2 for calling a global function with example usage: main(cmd) without return types