Samples and Docs for version 2.11.0 (because of Java 8)

[hr-roberthoffmann]

Dear community, sorry if that is a beginner question...
I can only use the version 2.11.0 of Mustang (because of Java 8 what we have).

Where do I find docs and samples for this version?

For example when I am compiling this example (https://www.mustangproject.org/use/#xrechnung) with 2.11.0 jar,
then I get the follwonig error on:

zf2p.setProfile(Profiles.getByName("XRechnung"));
error: cannot find symbol
symbol: method setProfile(Profile)

and

zf2p.generateXML(i):
incompatible types: Invoice cannot be converted to IZUGFeRDExportableTransaction

I would be very glad, if I could go futher on this point.
Perhaps the error does not depend on versions, don't know. Will check further.

Thank you very much for support and tipps.
Wish you all the best.