[logback-user] Getting class packaging information with IThrowableRenderer

Hi there, I very much like the class packaging information displayed for a stacktrace with the %xEx{depth} pattern. Due to its IThrowableRenderer mechanism, using %xEx{depth} with an HTMLLayout does not seem to make much sense, though. OTOH, the DefaultThrowableRenderer does not seem to emit this information by default (nor does it seem to be configurable). Is there a way to get this class packaging information for information rendered by a HTMLLayout's IThrowableRenderer without reinventing the wheel? If the latter is needed, where is the code implemeting the class packaging information retrieval for %xEx{depth} located? Thanks, Thilo