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);
                }

        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() {

     *
     * @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.
     */

        def versions = releasedVersions(snapshotVersion, oldRc, [])

        def newRc = releasedVersion(version, referenceBuildTime + buildTime)
        expect:
        ReleasedVersionsHelperKt.updateReleasedVersions(newRc, versions) == releasedVersions(snapshotVersion, newRc, [])

        where:
        version | buildTime
        '4.3-rc-3'   | 0
        '4.4-rc-1'   | -1

        List<Map<String, Object>> newDocs = new ArrayList<>();
        Map<String, Object> doc1 = new HashMap<>();
        doc1.put("title", "Doc1");
        Map<String, Object> doc2 = new HashMap<>();
        doc2.put("title", "Doc2");
        newDocs.add(doc1);
        newDocs.add(doc2);

        assertTrue(qrList.addAll(newDocs));
        assertEquals(2, qrList.size());