@Override
    public LoadBalancer newLoadBalancer(final LoadBalancer.Helper helper) {
        return new AbstractLoadBalancer(helper) {
            @Override
            protected AbstractReadyPicker newPicker(final List<Subchannel> list) {
                return new RoundRobinPicker(list);
            }
        };
    }
@Test
    public void testNewLoadBalancer() {
        LoadBalancer.Helper helper = mock(LoadBalancer.Helper.class);
        LoadBalancer loadBalancer = roundRobinLoadBalancerProvider.newLoadBalancer(helper);
        assertNotNull(loadBalancer);
    }