code: public RestBuilder enableCors() {
  
  		Set<String> allowedHeaders = new HashSet<>();
  		allowedHeaders.add("Access-Control-Allow-Origin");
  		//allowedHeaders.add("Access-Control-Allow-Credentials");
  		allowedHeaders.add("Access-Control-Allow-Headers");
  		allowedHeaders.add("Access-Control-Allow-Methods");
  		allowedHeaders.add("Access-Control-Expose-Headers");
  		allowedHeaders.add("Access-Control-Request-Method");
  		allowedHeaders.add("Access-Control-Request-Headers");
  		//allowedHeaders.add("Access-Control-Max-Age");
  		allowedHeaders.add("Origin");
  		return enableCors("*", false, -1, allowedHeaders);
  	}
docs: Enables CORS for all methods and headers /
  intended for testing purposes only - not recommended for production use
  @return self