View Source ExTDLib.Method.GetGroupsInCommon (ExTDLib v0.0.4)

Returns a list of common group chats with a given user. Chats are sorted by their type and creation date. Returns object_ptr<Chats>.

NameTypeDescription
user_idstringUser identifier.
offset_chat_idstringChat identifier starting from which to return chats; use 0 for the first request.
limitnumberThe maximum number of chats to be returned; up to 100.

More details on telegram's documentation.