protected void sendPrice(final String price) {
   subscriptionListener.publish(
       "STOCK",
       new JsonPayload("STOCK") {
         {
           addField("LastPrice", price);
         }
       });
 }
 @SuppressWarnings("serial")
 protected void setUpSubscriptionResponse() {
   subscriptionListener.setSubscriptionResponses(
       new HashMap<String, Payload>() {
         {
           put(
               "STOCK",
               new JsonPayload("STOCK") {
                 {
                   addField("LastPrice", "Initial");
                 }
               });
         }
       });
 }