How to check if an Event is cancelable from GWT code?

Question

Javascript events have a "cancelable" property.

How can this property be accessed from GWT code? It is not exported in GWT Event or NativeEvent classes.

user_2894562 · Answer

You could use JSNI:

  public native boolean eventIsCancelable(NativeEvent evt) /*-{
    return typeof evt.cancelable !== 'boolean' || evt.cancelable;
  }-*/;

Anyway, is calling

event.preventDefault();
event.stopPropagation();

not enough?