code: def main(cmd=None):
      """SVS training
  
      Example:
  
          % python svs_train.py svs --print_config --optim adadelta
          % python svs_train.py --config conf/train_svs.yaml
      """
      SVSTask.main(cmd=cmd)
  
label_desc: Use image node_id 2 for calling a global function with example usage: main(cmd) without return types