how to properly enable jax-ws schema validation in wls 12.1.3

@SchemaValidation

From this link https://docs.oracle.com/cd/E24329_01/web.1211/e24964/jws.htm#WSGET176 it states:

Enabling Schema Validation on the Server

Note:

The com.sun.xml.ws.developer.SchemaValidation API is supported as an extension to the JDK 6.0. Because this API is not provided as part of the JDK 6.0 kit, it is subject to change.

To enable schema validation on the server, add the @SchemaValidation annotation on the endpoint implementation. For example:

import com.sun.xml.ws.developer.SchemaValidation;
 import javax.jws.WebService;
 @SchemaValidation @WebService(name="HelloWorldPortType", serviceName="HelloWorldService") public class HelloWorldImpl { public String sayHelloWorld(String message) { System.out.println("sayHelloWorld:" + message); return "Here is the message: '" + message + "'"; } }