docstr: Add optimizer-specific arguments to the parser.
docstr_tok: ["Add","optimizer-specific","arguments","to","the","parser","."]
file_path: fairseq/examples/adaptive_span/adagrad_with_grad_clip.py
imports: from torch.optim import Adagrad
  from fairseq.optim import LegacyFairseqOptimizer, register_optimizer
label_desc: Use image node_id 2 for calling the FairseqAdagradWithGradClip obj's underlying member method code with example usage: obj.add_args(parser) without return types