final LlmChatRequest result = request.setStream(true);

        assertSame(request, result);
        assertTrue(request.isStream());
    }

    @Test
    public void test_fluentBuilding() {
        final LlmChatRequest request = new LlmChatRequest().addSystemMessage("You are a helpful assistant")
                .addUserMessage("Hello!")
                .addAssistantMessage("Hi there!")