String sTxt = editor.open();
String sTxt = editor.open( sCurrent );
    public void widgetSelected(SelectionEvent e)    {        ExternalizedTextEditorDialog editor = new ExternalizedTextEditorDialog(getShell(), SWT.APPLICATION_MODAL,            buildString(), keys, serviceprovider);        String sTxt = editor.open();        if (sTxt != null)        {            this.setText(sTxt);            if (sKey == null || sKey.length() == 0)            {                txtSelection.setEnabled(true);            }            else            {                txtSelection.setEnabled(false);            }            fireEvent();        }    }