code: def main():
      pass
  
imports: import torch
  import torch.nn
  from dataclasses import dataclass, field
  from typing import Union, List, Dict, Tuple, Any, Optional
  from torch.cuda.amp import autocast
  from transformers import Seq2SeqTrainer, Seq2SeqTrainingArguments
  from transformers.trainer_pt_utils import LabelSmoother
  from transformers.trainer import *
  from ..seq2seq.constraint_decoder import get_constraint_decoder
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types