code: public static PropertyIdentifier getIdentifier(final ConfigDescriptor descriptor)
      {
          checkNotNull(descriptor);
          return new PropertyIdentifierImpl(descriptor.getConfigName(), descriptor.getMethod().getDeclaringClass());
      }
docs: Generate a {@link PropertyIdentifier} annotation for use with Guice configuration-related bindings
  
  @param descriptor a {@link ConfigDescriptor} generated via {@link ConfigDescriptorFactory}
  @return a PropertyIdentifier for use with Guice bindings