@Override
    public void destroy() {
        if (this.snsClient != null) {
            try {
                this.snsClient.shutdown();
            } catch (Exception e) {
                log.error("Failed to shutdown SNS client during destroy()", e);
            }
        }
    }
@Test
    void givenSnsClientIsNull_whenDestroy_thenVerifyNoInteractions() {
        ReflectionTestUtils.setField(node, "snsClient", null);
        node.destroy();
        then(snsClientMock).shouldHaveNoInteractions();
    }