func (p *tagDiffProcessor) diffNewOld() []string {
	return p.diff(p.newTagIDs, p.oldTagIDs)
}
func (p *tagDiffProcessor) diffNewOld() []string {
	return p.diff(p.newTagIDs, p.oldTagIDs)
}
func ( p * tagDiffProcessor ) diffNewOld ( ) [ ] string { return p . diff ( p . newTagIDs , p . oldTagIDs ) }
// diffNewOld returns any elements of new that were missing in old.
diffNewOld returns any elements of new that were missing in old .