daysUntilExpiration determines when the local file should be removed, pass in 0 if it shouldn't be removed
the identifier (=name in database) that should given to this new local file
the name of the pdf we want to save as a local file
publicationKey is the key of the publication or an empty string (=current publication)
Generated using TypeDoc
daysUntilExpiration determines when the local file should be removed, pass in 0 if it shouldn't be removed