code: def download(datapath):
      opt = {"datapath": datapath}
      fnames = ["wizard_package3.tgz"]
      opt["model_type"] = "full_dialogue_retrieval_model"
      download_models(
          opt, fnames, "wizard_of_wikipedia", version="v3.0"
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: download(datapath) without return types