java RCP SWT the registerContextMenu(...) are lost

Question

In Java-SWT-RCP, I create several composites programmatically.

For each of them I register a menu:

eMenuService.registerContextMenu(this, "SourceViewer.popupmenu");

Everything work fine!

But, if I dispose one of the composites with the routine .dispose.

All the other composites lost the popupmenu.

Is there any method to unregister the menu properly, before it dispose the composite?

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