public int getNumOfFragments() {
        return numOfFragments;
    }

    /**
     * Sets the number of fragments with fluent interface.
     *
     * @param numOfFragments the maximum number of highlighted fragments
     * @return this HighlightInfo instance for method chaining
     */
    public HighlightInfo numOfFragments(final int numOfFragments) {
        this.numOfFragments = numOfFragments;
        return this;
    }

                    stream -> stream.forEach(hf -> highlightBuilder.field(new HighlightBuilder.Field(hf).highlighterType(highlighterType)
                            .fragmentSize(fragmentSize)
                            .numOfFragments(numOfFragments)
                            .boundaryChars(boundaryChars)
                            .boundaryMaxScan(boundaryMaxScan)
                            .boundaryScannerType(boundaryScannerType)

        public HighlightInfo getHighlightInfo() {
            return new HighlightInfo().fragmentSize(Integer.parseInt(fessConfig.getOrDefault("rag.chat.highlight.fragment.size", "500")))
                    .numOfFragments(Integer.parseInt(fessConfig.getOrDefault("rag.chat.highlight.number.of.fragments", "3")))
                    .preTags(StringUtil.EMPTY)
                    .postTags(StringUtil.EMPTY);
        }