docs: def translate_char(source_char, carrier, reverse=False, encoding=False):
      u"""translate unicode emoji character to unicode carrier emoji character (or reverse)
      
      Attributes:
          source_char   - emoji character. it must be unicode instance or have to set `encoding` attribute to decode
          carrier       - the target carrier
          reverse       - if you want to translate CARRIER => UNICODE, turn it True
          encoding      - encoding name for decode (Default is None)
      
      """
      if not isinstance(source_char, unicode) and encoding:
          source_char = source_char.decode(encoding, 'replace')
      elif not isinstance(source_char, unicode):
          raise AttributeError(u"`source_char` must be decoded to `unicode` or set `encoding` attribute to decode `source_char`")
      if len(source_char) > 1:
          raise AttributeError(u"`source_char` must be a letter. use `translate` method insted.")
      translate_dictionary = _loader.translate_dictionaries[carrier]
      if not reverse:
          translate_dictionary = translate_dictionary[0]
      else:
          translate_dictionary = translate_dictionary[1]
      if not translate_dictionary:
          return source_char
      return translate_dictionary.get(source_char, source_char)