var items = [ItemViewController.Item]()

Database.database().reference(withPath: "items").observe(.childAdded, with: { snapshot in
         var newItems: [ItemViewController.Item] = []
        for child in snapshot.children { // children of "items"
            if let snapshot = child as? DataSnapshot,

                let item = ItemViewController.Item(snapshot: snapshot) {
                //print(item)
                newItems.append(item)
                //print(item.key)
            }
        }
        self.items = newItems
        print(self.items)
        self.tableView.reloadData()
    })

}

self.name = name
        self.key = snapshot.key
        //print("snapshot.key = (snapshot.key)")
        self.surname = surname
        self.age = age

    }