chat responses

@Test
void clientOpenClientTest() {
    OpenAIClient client = OpenAIOkHttpClient.builder()
            .apiKey(apiKey) // Your access key
            .baseUrl("https://ai.pmock.com/api/ai/chat/v1")
            .build();

    ChatCompletionCreateParams params = ChatCompletionCreateParams.builder()
            .model("gpt-5.2")
            .addMessage(ChatCompletionMessageParam.ofSystem(
                    ChatCompletionSystemMessageParam.builder().content("You are a helpful assistant.").build()))
            .addMessage(ChatCompletionMessageParam.ofUser(
                    ChatCompletionUserMessageParam.builder().content("Hello!").build()))
            .build();

    ChatCompletion chatCompletion = client.chat().completions().create(params);
    System.out.println(chatCompletion.choices().get(0).message().content());
}

    @Test
void streamClientOpenClientTest() {
    OpenAIClient client = OpenAIOkHttpClient.builder()
            .apiKey(apiKey) // Your access key
            .baseUrl("https://ai.pmock.com/api/ai/chat/v1")
            .build();

    ChatCompletionCreateParams streamParams = ChatCompletionCreateParams.builder()
            .model("gpt-5.2")
            .addMessage(ChatCompletionMessageParam.ofSystem(
                    ChatCompletionSystemMessageParam.builder().content("You are a helpful assistant.").build()))
            .addMessage(ChatCompletionMessageParam.ofUser(
                    ChatCompletionUserMessageParam.builder().content("Hello!").build()))
            .build();

    try (StreamResponse<ChatCompletionChunk> streaming = client.chat().completions().createStreaming(streamParams)) {
        streaming.stream().forEach(chunk -> {
            if (!chunk.choices().isEmpty()) {
                String content = chunk.choices().get(0).delta().content().orElse("");
                System.out.print(content);
            }
        });
    }
}