Steps to Reproduce

<button onClick='System.out.println(Executions.getCurrent().getParameterMap().values());'/>

1. click the button without WebSocket enabled, you get a collection with 4 values
2. enabled WebSocket with org.zkoss.zkmax.au.websocket.WebSocketWebAppInit
3. Click the button

Current Result

Executions.getCurrent().getParameterMap() returns an empty collection

Expected Result

returns the expected parameters like under AJAX

Debug Information

• app dev might check parameters to to further action e.g. in PerformanceMeter, check parameters to know which events in an Execution