private void addDom(Xpp3Dom parent, String childName, String childValue, InputLocation location) {
        if (StringUtils.isNotEmpty(childValue)) {
            parent.addChild(newDom(childName, childValue, location));
        }
    }

    private Xpp3Dom newDom(String name, String value, InputLocation location) {
        Xpp3Dom dom = new Xpp3Dom(name, location);
        dom.setValue(value);
        return dom;
    }

     *
     * @return The new part of speech.
     */
    public String getNewPos() {
        return newPos;
    }

    /**
     * Sets the new part of speech.
     *
     * @param newPos The new part of speech.
     */
    public void setNewPos(final String newPos) {
        this.newPos = newPos;
    }

    /**
     * Returns the token.
     *
     * @return The token.
     */

            final Map<String, Object> newDoc = fessConfig.convertToStorableDoc(doc);
            newDoc.put(indexFieldId, crawlingInfoHelper.generateId(newDoc));
            newDoc.put(indexFieldDocId, systemHelper.generateDocId(newDoc));
            if (newDoc.get(indexFieldLang) instanceof final List<?> langList) {
                if (langList.contains("auto")) {
                    newDoc.remove(indexFieldLang);
                }

	prf := hmac.New(sha256.New, s.key)
	prf.Write(iv)
	key := prf.Sum(make([]byte, 0, prf.Size()))

	block, err := aes.NewCipher(key)
	if err != nil {
		return DEK{}, err
	}
	aead, err := cipher.NewGCM(block)
	if err != nil {
		return DEK{}, err
	}

	plaintext, err := sioutil.Random(32)
	if err != nil {
		return DEK{}, err
	}
	ciphertext := aead.Seal(nil, nonce, plaintext, associatedData)

        List<Integer> indexes = Arrays.asList(1, 2);
        RelevanceEvaluationResult result = RelevanceEvaluationResult.withRelevantDocs(docIds, indexes);

        try {
            result.getRelevantDocIds().add("newDoc");
            fail("DocIds list should be immutable");
        } catch (UnsupportedOperationException e) {
            // Expected
        }
    }

    @Test
    public void test_indexesAreImmutable() {