getLastReturnValue

   // In practice AbstractEventData is just the abstract class.
   // You must actually use one of the classes that extend it.
    public Object handleEvent(EventFireTime fireTime, AbstractEventData data) {
        // While you can specifically grab any data from the data object,
                // if this is a method that has a return value that matters,
                // it's best to get it as the last return value, so that multiple
                // events can be chained together.  The input data object
                // will always have the original values for all the other getters
                Object returnValue = data.getLastReturnValue();

       
        // do something
       
        // The EventFireTime values describe in the documentation what the return
                // value will do, or says nothing about it if the value is ignored
                // If you don't intend to modify the return, always return data.getLastReturnValue();
        return data.getLastReturnValue();
    }