public Set<String> getLabels() {
        return labels;
    }
@Test
    void testParseSelector() throws NacosException {
        Selector selector = selectorManager.parseSelector("label", "CONSUMER.label.A=PROVIDER.label.A &CONSUMER.label.B=PROVIDER.label.B");
        assertTrue(selector instanceof LabelSelector);
        
        LabelSelector labelSelector = (LabelSelector) selector;
        assertEquals(2, labelSelector.getLabels().size());
        assertTrue(labelSelector.getLabels().contains("A"));
        assertTrue(labelSelector.getLabels().contains("B"));
    }