class_docstr: Drops out '__retrieved-docs__' to only keep a maximum number in each example.
code: def add_cmdline_args(
      cls, parser: ParlaiParser, partial_opt: Optional[Opt] = None
  ) -> ParlaiParser:
      parser.add_argument(
          "--woi-doc-max-chunks",
          default=100,
          type=int,
          help="Largest number of chunks to use, others will be dropped out at random. Chunks containing gold checked sentences will not be removed.",
      )
  
imports: import torch
  from parlai.core.mutators import register_mutator, MessageMutator, ManyEpisodeMutator
  from typing import Optional
  from parlai.core.opt import Opt
  from parlai.core.message import Message
  from parlai.core.params import ParlaiParser
  import parlai.tasks.wizard_of_internet.constants
  from parlai.tasks.wizard_of_wikipedia.mutators import AddLabel, AddLabelLM, CheckedSentenceAsLabel, AddCheckedSentence
label_desc: Use image node_id 1 for calling the WoiDropoutRetrievedDocs obj's underlying member method code with example usage: obj.add_cmdline_args(cls, parser, partial_opt) without return types