code: private static boolean isAsyncMethod(Method method) {
          Class<?>[] parameterTypes = method.getParameterTypes();
          for (Class<?> c : parameterTypes)
          {
              if (c.isAssignableFrom(javax.ws.rs.container.AsyncResponse.class))
                  return true;
          }
          return false;
      }
docs: Liberty Change for CXF Begain