@Override
		public boolean isAddToPopup(ActionContext context) {
			return context instanceof ListingActionContext || isEnabledForContext(context);
		}
@see java.awt.datatransfer.ClipboardOwner#lostOwnership(java.awt.datatransfer.Clipboard,
     java.awt.datatransfer.Transferable)
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/clipboard/ClipboardPlugin.java