docstr: Stub save which dumps options.
  
  Necessary for evaluation scripts to load the model.
docstr_tok: ["Stub","save","which","dumps","options",".","Necessary","for","evaluation","scripts","to","load","the","model","."]
code: def save(self, path=None):
      """
      Stub save which dumps options.
  
      Necessary for evaluation scripts to load the model.
      """
      if not path:
          return
  
      with PathManager.open(path, "w") as f:
          f.write(self.get_prediction() + "\n")
  
      with PathManager.open(path + ".opt", "w") as f:
          json.dump(self.opt, f)
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  import json
  import re
  from parlai.core.agents import Agent
  from parlai.core.dict import DictionaryAgent
  from itertools import islice
  from parlai.utils.io import PathManager
label_desc: Use image node_id 9 for calling the UnigramAgent obj's underlying member method code with example usage: obj.save(path) without return types