fix typo in statement

        get_request = GetRequest()

        get_request.type = GetRequest.DataType.ALL

        get_request.encoding = get_request.encoding = Encoding.Value(self._encoding) if self._encoding else Encoding.JSON_IETF

        get_request.encoding = Encoding.Value(self._encoding) if self._encoding else Encoding.JSON_IETF

        #get_request.use_models.add() # kept empty: return for all models supported

        for i,resource_key in enumerate(resource_keys):

            str_resource_name = 'resource_key[#{:d}]'.format(i)