PersistentContainer.swift

import CoreData

struct CoreDataServiceConsts {
    static let applicationGroupIdentifier = "com.coredatainextension"
}

final class PersistentContainer: NSPersistentContainer {
    internal override class func defaultDirectoryURL() -> URL {
        var url = super.defaultDirectoryURL()
        if let newURL =
            FileManager.default.containerURL(
                forSecurityApplicationGroupIdentifier: "group.com.coredatainextension.somedata") {
            url = newURL
        }
        return url
    }
}

//var containerPath = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.nevercalledagain.contacts")?.path
//var sqlitePath = "(containerPath)/("database.sqlite")"