class_docstr: Helper function for downloading external dependency
  
  >>> from nlpaug.util.file.download import DownloadUtil
docstr: :param str model_name: GloVe pre-trained model name. Possible values are 'wiki-news-300d-1M',
      'wiki-news-300d-1M-subword', 'crawl-300d-2M' and 'crawl-300d-2M-subword'
  :param str dest_dir: Directory of saving file
  
  >>> DownloadUtil.download_fasttext('glove.6B', '.')
docstr_tok: [":","param","str","model_name",":","GloVe","pre-trained","model","name",".","Possible","values","are","'wiki-news-300d-1M","'",",","'wiki-news-300d-1M-subword","'",",","'crawl-300d-2M","'","and","'crawl-300d-2M-subword'",":","param","str","dest_dir",":","Directory","of","saving","file",">",">",">","DownloadUtil.download_fasttext","(","'glove.6B","'",",","'",".","'",")"]
code: def download_fasttext(model_name, dest_dir):
      """
      :param str model_name: GloVe pre-trained model name. Possible values are 'wiki-news-300d-1M',
          'wiki-news-300d-1M-subword', 'crawl-300d-2M' and 'crawl-300d-2M-subword'
      :param str dest_dir: Directory of saving file
  
      >>> DownloadUtil.download_fasttext('glove.6B', '.')
  
      """
  
      url = ""
      if model_name == "wiki-news-300d-1M":
          url = "https://dl.fbaipublicfiles.com/fasttext/vectors-english/wiki-news-300d-1M.vec.zip"
      elif model_name == "wiki-news-300d-1M-subword":
          url = "https://dl.fbaipublicfiles.com/fasttext/vectors-english/wiki-news-300d-1M-subword.vec.zip"
      elif model_name == "crawl-300d-2M":
          url = "https://dl.fbaipublicfiles.com/fasttext/vectors-english/crawl-300d-2M.vec.zip"
      elif model_name == "crawl-300d-2M-subword":
          url = "https://dl.fbaipublicfiles.com/fasttext/vectors-english/crawl-300d-2M-subword.zip"
      else:
          possible_values = ["wiki-news-300d-1M", "crawl-300d-2M"]
          raise ValueError(
              "Unknown model_name. Possible values are {}".format(
                  possible_values
              )
          )
  
      file_path = DownloadUtil.download(url, dest_dir=dest_dir)
      DownloadUtil.unzip(file_path)
  
file_path: nlpaug/nlpaug/util/file/download.py
imports: import gzip
  import os
  import shutil
  import tarfile
  import urllib
  import zipfile
  import gdown
  import requests
label_desc: Use image node_id 3 for calling the DownloadUtil obj's underlying member method code with example usage: obj.download_fasttext(model_name, dest_dir) without return types