Currently it is inconvenient to programmatically determine if a module is patched or not.

2 options are to either list all the module resources, and see if they are located in a common root path, or to rely on the toString output of ModuleReferenceImpl.

However, ModuleReferenceImpl does have an `isPatched` predicate, which could be exposed through the ModuleReference interface. For a given module we could ten determine whether it is patched like so:

    public static boolean isPatched(Module mod) {
        return mod.getLayer()
          .configuration().findModule(mod.getName()).orElseThrow() // ResolvedModule
          .reference().isPatched();
    }