What's the difference between `astream_

Astream is the asynchronous version, for reference you can find them here: https://docs.llamaindex.ai/en/latest/api_reference/query/chat_engines.html#

ah mb, I meant to ask about astream-chat and achat

I notice the achat returns a union of the streaming and non-streaming

when would the streaming version be returned in the achat context?

where did you see that?

weird, that might be a bug

I can't think of why it's typed like that

every actual implementation of achat using that base class is typed to return AgentChatResponse (I just checked lol) --- so yea, just a bug/dead typing on the base class