docs: protected void fireEditingCanceled() {
          // Guaranteed to return a non-null array
          Object[] listeners = listenerList.getListenerList();
          // Process the listeners last to first, notifying
          // those that are interested in this event
          for (int i = listeners.length-2; i>=0; i-=2) {
              if (listeners[i]==CellEditorListener.class) {
                  ((CellEditorListener)listeners[i+1]).editingCanceled(new ChangeEvent(this));
              }
          }
      }