docs: public <T> T createContextualProxy(Map<String, String> execProps,
                                         J2EEName j2eeName,
                                         T instance,
                                         Class<T> intf) {
  
          ThreadContextDescriptor tcd = createThreadContext(execProps, j2eeName);
          return contextService.createContextualProxy(tcd, instance, intf);
      }