code: def __init__(self, args, task):
      super().__init__(args, task)
      self.eps = args.label_smoothing
      self.kd_weight = args.kd_weight
  
file_path: translate/pytorch_translate/research/knowledge_distillation/dual_decoder_kd_loss.py
imports: import math
  from fairseq import utils
  from fairseq.criterions import LegacyFairseqCriterion, register_criterion
label_desc: Use image node_id 1 to create a new DualDecoderCriterion object from inherited base classes: LegacyFairseqCriterion with example: obj = DualDecoderCriterion(args, task)