void notifyLongSelectionListeners()
    {
        if (longSelectionListeners.isEmpty()) return;

        Event basicEvent = new Event();
        basicEvent.widget = this;
        SelectionEvent anEvent = new SelectionEvent(basicEvent);
        anEvent.width = (int) (startPosition >>> 32);
        anEvent.x = (int) startPosition;
        anEvent.height = (int) (endPosition >>> 32);
        anEvent.y = (int) endPosition;

        for (SelectionListener aListener : longSelectionListeners) {
            aListener.widgetSelected(anEvent);
        }
    }
Initialise merger variables

@return whether the parameters hold any data
plugins/org.jkiss.dbeaver.ui.editors.hex/src/org/jkiss/dbeaver/ui/editors/binary/HexEditControl.java