code: def _translate(self, options):
          
          translation = dict()
          for key, val in iteritems_(options):
              self._validate(key, val, feed_arg_types(self._source))
              try:
                  if isinstance(val, STRTYPE):
                      translation[key] = val
                  elif not isinstance(val, NONETYPE):
                      arg_converter = TYPE_CONVERTERS.get(type(val), json.dumps)
                      translation[key] = arg_converter(val)
              except Exception as ex:
                  raise CloudantArgumentError(115, key, ex)
          return translation
docs: Perform translation of feed options passed in as keyword
          arguments to CouchDB/Cloudant equivalent.