/*if (contentAssistSubjectControl != null)
return contentAssistSubjectControl.appendVerifyKeyListener(verifyKeyListener);
else */
if (viewer instanceof ITextViewerExtension) {
ITextViewerExtension extension= (ITextViewerExtension)viewer;
extension.appendVerifyKeyListener(verifyKeyListener);
return true;
} else {
StyledTextArea textWidget= viewer.getTextWidget();
// if (Helper.okToUse(textWidget)) {
textWidget.addEventHandler(VerifyEvent.VERIFY,verifyKeyListener);