[Pharo-project] Lost code

I have at times been disappointed to see good coding effort get lost, both in browsers and the debugger. In the latter, it seems to happen when it warns about having to revert to a previous block or something along those lines. The browser loses are still mysterious to me - maybe it happens if code pane isn't properly associated with the selected class. Is there a way that the tools could keep a buffer of a few "accepts" worth of code to salvage such situations? Bill