The "Duplicate Element" node action fails when applied to a NamespaceImport

[pcdavid]

Scenario:

Capture.video.du.2026-01-16.16-43-13.mp4

In org.eclipse.syson.diagram.services.DiagramMutationDiagramService.duplicateElementAndExpose(Element, IEditingContext, DiagramContext, Node, Map<NodeDescription, NodeDescription>), element.getOwningMembership() returns null, so the whole method returns null, which is interpreted as a failure by the enclosing ChangeContext model operation.

[pcdavid]

Note that the "Duplicate object" tree item action is not available for these elements from the Explorer. Probably because of the check made in SysONDuplicateDelegate.canHandle(IEditingContext, EObject, EObject, String, DuplicationSettings). If that is correct, the same test should also be applied to decide if the "Duplicate element" should be contributed or not to a node (I assume both share the same logic and constraints, but that may not be exactly the case).

[pcdavid]

Correction: the actual check for the Explorer action is here.