As of 3.4, temporary annotations are no longer discolored in the editor's overview ruler. There were many complaints
that the color was computed by discoloring the color set on the General > Editors > Text Editors > Annotations preference page. Clients that nevertheless
want to stick to the old behavior can use org.eclipse.jface.text.source.OverviewRuler.OverviewRuler(IAnnotationAccess, int, ISharedTextColors, boolean)
to create the overview ruler.