docstr: Add task-specific arguments to the parser.
docstr_tok: ["Add","task-specific","arguments","to","the","parser","."]
code: def add_args(parser):
      """Add task-specific arguments to the parser."""
      parser.add_argument("--dict-size", default=49996, type=int)
      parser.add_argument("--dataset-size", default=100000, type=int)
      parser.add_argument("--src-len", default=30, type=int)
      parser.add_argument("--tgt-len", default=30, type=int)
  
imports: import logging
  import numpy
  import torch
  from fairseq.data import Dictionary, FairseqDataset
  from fairseq.tasks import LegacyFairseqTask, register_task
label_desc: Use image node_id 1 for calling the DummyMTTask obj's underlying member method code with example usage: obj.add_args(parser) without return types