https://help.eclipse.org/latest/topic/org.eclipse.platform.doc.isv/reference/api/org/eclipse/e4/ui/workbench/UIEvents.OpaqueMenuSeparator.html
UIEvents.OpaqueMenuSeparator (Eclipse Platform API Specification)
declaration: package: org.eclipse.e4.ui.workbench, class: UIEvents, interface: OpaqueMenuSeparator
platform apieclipsespecification