@Override
    public LoadBalancer.PickResult pickSubchannel(final LoadBalancer.PickSubchannelArgs args) {
        return status.isOk() ? LoadBalancer.PickResult.withNoResult() : LoadBalancer.PickResult.withError(status);
    }
@Test
    public void testPickSubchannel() {
        Status status = mock(Status.class);
        when(status.isOk()).thenReturn(true);
        EmptyPicker picker = new EmptyPicker(status);
        assertNotNull(picker.pickSubchannel(null));
    }