import CoreData import Foundation extension OpenAPS_Battery { static func fetch(_ predicate: NSPredicate = .predicateFor30MinAgo) -> NSFetchRequest { let request = OpenAPS_Battery.fetchRequest() request.sortDescriptors = [NSSortDescriptor(keyPath: \OpenAPS_Battery.date, ascending: false)] request.fetchLimit = 1 request.predicate = predicate return request } }