Whether to disable streaming for this model.
If streaming is bypassed, then stream/astream/astream_events will
defer to invoke/ainvoke.
True, will always bypass streaming case.'tool_calling', will bypass streaming case only when the model is called
with a tools keyword argument. In other words, LangChain will automatically
switch to non-streaming behavior (invoke) only when the tools argument is
provided. This offers the best of both worlds.False (Default), will always use streaming case if available.The main reason for this flag is that code might be written using stream and
a user may want to swap out a given model for another model whose implementation
does not properly support streaming.