Uses timeProvider as the clock that dates what the engine writes, such as the modification date a save
records (ISO 32000-2 §14.3.4), in place of .
public PdfOptions UseTimeProvider(TimeProvider timeProvider)
The clock; dates are written in its local time zone.
ISO 32000-2 §14.3.3 and §14.3.4. A fixed clock makes saved files reproducible.