code: protected void fireSourceUpdated(S e) {
          for (int i = 0, n = this.listenerList.size(); i < n; i++) {
              this.listenerList.get(i).sourceUpdated(e);
          }
      }
docs: Notifies registered listeners that the source has been updated.
  
  @param e a {@link SourceUpdatedEvent} representing an update.
  
  @see SourceListener