* @throws LlmException if LLM is not available
     */
    public void generateDocumentNotFoundResponse(final String userMessage, final String documentUrl, final List<LlmMessage> history,
            final LlmStreamCallback callback) {
        if (logger.isDebugEnabled()) {
            logger.debug("[LLM] Delegating generateDocumentNotFoundResponse. llmType={}", getLlmType());
        }