public static Builder builder() {
        return new Builder();
    }
@Test
    public void testEqualsAndHashCode() {
        SpringCloudSelectorHandle selectorHandle1 = SpringCloudSelectorHandle.builder().serviceId("serviceId").build();
        SpringCloudSelectorHandle selectorHandle2 = SpringCloudSelectorHandle.builder().serviceId("serviceId").build();
        
        assertThat(ImmutableSet.of(selectorHandle1, selectorHandle2), hasSize(1));
    }