Hi fellow Christian :-)
I am using the open generated / open source file already, and it is a great feature. However it still means working with two source files.
The reason I request this is because I am constantly having to do this. One of the weaknesses of Xtend compared to a natively compiled language is that stack traces are always referring to Java code lines.
For example, I am now working on a gradle project with enhancements where I literally am debugging a nasty issue and I estimate I am jumping to Java line numbers in Xtend code literally hundreds of times yesterday. Being able to jump right to the xtend code line by entering a java line would save a lot!
However, that stack trace in the console copy trick also will help a bit, thank you.