styledText.removeKeyListener(fKeyListener);
if (fLastProposal != null) {
if (fLastProposal instanceof ICompletionProposalExtension2) {
ICompletionProposalExtension2 extension= (ICompletionProposalExtension2) fLastProposal;
extension.unselected(fViewer);
}
fLastProposal= null;
}