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