docMap.put(fessConfig.getQueryCollapseInnerHitsName() + "_count", totalHits);
                                final DocumentField bitsField = searchHit.getFields().get(fessConfig.getIndexFieldContentMinhashBits());
                                if (bitsField != null && !bitsField.getValues().isEmpty()) {

                    final DocumentHelper documentHelper = ComponentUtil.getDocumentHelper();
                    context.addQuery(boolQuery -> {
                        boolQuery.filter(QueryBuilders.termQuery(fessConfig.getIndexFieldContentMinhashBits(),
                                documentHelper.decodeSimilarDocHash(similarDocHash)));
                    });
                }

     * comment: Field name for content minhash bits in the index.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexFieldContentMinhashBits();

    /**
     * Get the value for the key 'index.field.cache'. <br>
     * The value is, e.g. cache <br>
     * comment: Field name for cache in the index.