I think there is a mismatch in the model document regarding the return codes of
Pause-Printer, Resume-Printer and the Purge-Printer operation.
In section 13.2 "Status Codes for IPP Operations" it says that the operation may
'client-error-not-possible', but how can that be when section 3.2.7
says that no matter of what state the printer object has, it returns