...org/fortiss/tooling/base/ui/editor/DiagramEditorBase.java

...l/ui/extension/IContextMenuMultiSelectionContributor.java

...ling/kernel/ui/extension/base/MultiEObjectActionBase.java

.../kernel/ui/extension/data/ContextMenuContextProvider.java

...ortiss/tooling/kernel/ui/internal/ContextMenuService.java

.../kernel/ui/internal/editor/ExtendableMultiPageEditor.java

...s/tooling/kernel/ui/internal/views/NavigatorViewPart.java

...fortiss/tooling/kernel/ui/util/EObjectSelectionUtils.java