@Override
        public void install(IContextInformation info, ITextViewer viewer, int offset)
        {
            fInstallOffset = offset;
        }
Simple content assist tip closer. The tip is valid in a range of 5
characters around its popup location.
plugins/org.jkiss.dbeaver.ui.editors.sql/src/org/jkiss/dbeaver/ui/editors/sql/syntax/SQLCompletionProcessor.java