docs: def _build_option_string(self, options):
          """
          :param options: dictionary containing the options
          :returns: option_string formatted for an API endpoint
          """
          option_string = ""
          if options is not None:
              for key in options:
                  option_string += "/%s-%s" % (key, options[key])
          return self._quote_url(option_string)