class_docstr: Wrapper for fastText embeddings.
class_docstr_tok: ["Wrapper","for","fastText","embeddings","."]
docstr: Make the URL at which the requested model may be
  downloaded.
code: def _build_fasttext_url(self):
      """Make the URL at which the requested model may be
      downloaded."""
      fasttext_code = MAP_LANGS_CLTK_FASTTEXT[self.iso_code]
      if self.training_set == "wiki":
          if self.model_type == "vec":
              ending = "vec"
          else:
              # for .bin
              ending = "zip"
          url = f"https://dl.fbaipublicfiles.com/fasttext/vectors-wiki/wiki.{fasttext_code}.{ending}"
      elif self.training_set == "common_crawl":
          url = f"https://dl.fbaipublicfiles.com/fasttext/vectors-crawl/cc.{fasttext_code}.300.{self.model_type}.gz"
      else:
          raise CLTKException("Unexpected exception.")
      return url
  
imports: import os
  from typing import List
  from zipfile import ZipFile
  from gensim import models
  from cltk.core.cltk_logger import logger
  from cltk.core.exceptions import CLTKException, UnimplementedAlgorithmError
  from cltk.data.fetch import FetchCorpus
  from cltk.languages.utils import get_lang
  from cltk.utils import CLTK_DATA_DIR, get_file_with_progress_bar, query_yes_no
  from cltk.utils.file_operations import make_cltk_path
label_desc: Use image node_id 11 for calling the FastTextEmbeddings obj's underlying member method code with example usage: obj._build_fasttext_url() and returns: url