Well, there is `EngineCon` interface [1]. And two types (`engineIPC` [2] and `engineRPC` [3]) that implement the interface. That's why there is some repetition.

Well, there is `EngineCon` interface [1]. And two types (`engineIPC` [2] and `engineRPC` [3]) that implement the interface. That's why there is some repetition. So, what? [1]: https://github.com/google/seesaw/blob/master/common/conn/conn.go#L31 https://github.com/google/seesaw/blob/master/common/conn/con... [2]: https://github.com/google/seesaw/blob/master/common/conn/ipc.go#L34 https://github.com/google/seesaw/blob/master/common/conn/ipc... [3]: https://github.com/google/seesaw/blob/master/common/conn/rpc.go#L35 https://github.com/google/seesaw/blob/master/common/conn/rpc...