Server compatibility for client in v1 and v2

[Hazzer]

According to this site: https://socketio.github.io/socket.io-client-java/installation.html compatibility between client v2 and v1 must be turned on with allowEIO3 flag. How to do this in the current implementation?

[trinopoty]

With version 6.0.1 of the server library, the older v3 protocol is automatically supported. There is no need for any flags to enable support.