@JsonIgnore
	public Mono<String> getReplyCombinedText() {
		if (isEmpty())
			return Mono.empty();
		return Flux.fromIterable(choices).flatMap(choice -> {
			final ChatMessage message = choice.getMessage();
			if (message != null) {
				return message.getReplyCombinedText();
			}
			return Mono.empty();
		}).collectList().map(items -> items.stream().filter(Objects::nonNull).collect(Collectors.joining()));
	}
get reply text from messages' content
@return reply text
src/main/java/org/mvnsearch/chatgpt/model/completion/chat/ChatCompletionResponse.java