Predict

        let fetchRequest: NSFetchRequest<Staff> = Staff.fetchRequest()
		if self.manager != nil {
			fetchRequest.predicate = NSPredicate(format: "manager = %@", self.manager!)
		}
        do {
			item = try (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext.fetch(fetchRequest)
		} catch {
			print(String(format: "Error %@: %d",#file, #line))
		}

	}