Langchain backend for Agents

[aayushchhabra1999]

We have an existing Langchain-based application but want to migrate to AutoGen. In the technical paper for Autogen, in Section 5.1 General Guidelines for Using Autogen, in point 5 (2), it is mentioned that "When existing tools from LangChain etc. are helpful, one can use them as tool-backend for AutoGen agents." - How can we do that? Are there any existing examples? Can someone share a brief on this? I believe this will be helpful to lots of people who would want to migrate from Langchain to AutoGen.

@sonichi @qingyun-wu

[sonichi]

Check this: #58
If you'd like to review it and share your feedback, it'll be great!

[mjmjmmmjjj]

Can be used as a custom function.