public ChatRequestBuilder presencePenalty(Double presencePenalty) {
		request.setPresencePenalty(presencePenalty);
		return this;
	}
Number between -2.0 and 2.0. Positive values penalize new tokens based on whether
they appear in the text so far, increasing the model's likelihood to talk about new
topics.
@param presencePenalty presence penalty, default is 0
@return builder
src/main/java/org/mvnsearch/chatgpt/model/completion/chat/ChatRequestBuilder.java