public String toMessage() {
        String msg = "";
        if (cause == null) {
            msg += description;
        } else {
            String placeHolder = description == null ? "" : description;
            msg += StringUtils.toString(placeHolder, cause);
        }
        return msg;
    }
@Test
    void toMessage() {
        String message = TriRpcStatus.NOT_FOUND
                .withDescription("desc")
                .withCause(new IllegalStateException("test"))
                .toMessage();
        Assertions.assertTrue(message.contains("desc"));
        Assertions.assertTrue(message.contains("test"));
    }