code: def param_groups(self):
      return self.optimizer.param_groups
  
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 7 for calling the FairseqOptimizer obj's underlying member method code with example usage: obj.param_groups() and returns: self