code: def add_lexicon_args(params, is_for_block_lexicon: bool = False):
      lexicon_params = params.add_argument_group("Model & Top-k")
      lexicon_params.add_argument(
          "--model",
          "-m",
          required=True,
          help="Model directory containing source and target vocabularies.",
      )
      if not is_for_block_lexicon:
          lexicon_params.add_argument(
              "-k",
              type=int,
              default=200,
              help="Number of target translations to keep per source. Default: %(default)s.",
          )
  
imports: import argparse
  import os
  import sys
  import types
  from typing import Any, Callable, Dict, List, Tuple, Optional
  import yaml
  from sockeye.utils import smart_open
  from .None import constants
label_desc: Use image node_id 13 for calling a global function with example usage: add_lexicon_args(params, is_for_block_lexicon) without return types