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