public boolean isRunning(Member member) {
        RpcClient client = RpcClientFactory.getClient(memberClientKey(member));
        if (null == client) {
            return false;
        }
        return client.isRunning();
    }
@Test
    void testIsRunningForNonExist() {
        Member member = new Member();
        member.setIp("11.11.11.11");
        assertFalse(clusterRpcClientProxy.isRunning(member));
    }