class_docstr: Manage TTS models defined in .models.json.
  It provides an interface to list and download
  models defines in '.model.json'
  
  Models are downloaded under '.TTS' folder in the user's
  home path.
  
  Args:
      models_file (str): path to .model.json
class_docstr_tok: ["Manage","TTS","models","defined","in",".models.json",".","It","provides","an","interface","to","list","and","download","models","defines","in","'.model.json'","Models","are","downloaded","under","'.TTS","'","folder","in","the","user's","home","path",".","Args",":","models_file","(","str",")",":","path","to",".model.json"]
code: def _download_file(self, idx, output):
      gdown.download(f"{self.url_prefix}{idx}", output=output)
  
file_path: TTS/TTS/utils/manage.py
imports: import json
  import gdown
  from pathlib import Path
  import os
  from TTS.utils.io import load_config
  from TTS.utils.generic_utils import get_user_data_dir
label_desc: Use image node_id 7 for calling the ModelManager obj's underlying member method code with example usage: obj._download_file(idx, output) without return types