okay here's a more refined question, on this page: https://docs.llamaindex.ai/en/stable/module_guides/querying/response_synthesizers/root.html#using-custom-prompt-templates-with-additional-variables

Where it calls TreeSummarize, what can I call instead that will allow for a compact response mode and a streaming response? I've delved into the code quite a bit but I'm not seeing anything out of the box