code: public static Version getSpecificationVersionFor(Class<?> type)
     {
        Assert.notNull(type, "Type must not be null.");
        final Version result;
        Package pkg = type.getPackage();
        if (pkg == null)
        {
           result = EmptyVersion.getInstance();
        }
        else
        {
           String version = pkg.getSpecificationVersion();
           if (Strings.isNullOrEmpty(version))
           {
              result = EmptyVersion.getInstance();
           }
           else
           {
              result = SingleVersion.valueOf(version);
           }
        }
        return result;
     }
docs: Returns the Specification version for the given {@link Class}
  
  @param type the {@link Class} with the corresponding package
  @return {@link Version} representation from the {@link Package#getSpecificationVersion()} returned from
  {@link Class#getPackage()}