code: def get_supported_locales():
      """Returns a list of all the supported locale codes."""
      return _supported_locales
  
imports: from __future__ import absolute_import, division, print_function
  import codecs
  import csv
  import datetime
  from io import BytesIO
  import numbers
  import os
  import re
  from tornado import escape
  from tornado.log import gen_log
  from tornado.util import PY3
  from tornado._locale_data import LOCALE_NAMES
label_desc: Use image node_id 5 for calling a global function with example usage: get_supported_locales() and returns: _supported_locales