Version is null

[DanielHreben]

I need to get the current version of livr implementation at runtime. This is required to automatically display it at http://livr-multi-playground.webbylab.com/. I have no idea how to get it since I'm not a Java programmer, but I googled and I tried next ways:

String livrVersion = Class.forName("livr.LIVR").getPackage().getSpecificationVersion();
String livrVersion = LIVR.validator().getClass().getPackage().getSpecificationVersion();

In both cases livrString is null