How to send from one serial port to another?

[jonrichings]

Like this lib a lot since it cleans up my messy code. But because of the requirement to use sender->GetSerial()->println(...) I can't figure out how to read some from one port and send to the other. Does every print have to be triggered by a handler? Is there a way to just address a print to a specific serial port without it being the result of an incoming command?