code: def __init__(self, args):
      self.args = args
  
imports: import torch
  from fairseq import utils
  from fairseq.dataclass.utils import gen_parser_from_dataclass
  from collections import defaultdict
label_desc: Use image node_id 1 to create a new LegacyFairseqOptimizer object from inherited base classes: FairseqOptimizer with example: obj = LegacyFairseqOptimizer(args)