def call(self, method, args, kwargs, one_way=False):
        req = self.protocol.create_request(method, args, kwargs, one_way)

        return self._send_and_handle_reply(req).result
Substracts delta from the cache version for the supplied key. Returns
dataset/ETHPy150Open mbr/tinyrpc/tinyrpc/client.py/RPCClient.call--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/core/cache/backends/base.py/BaseCache.decr_version