dequeueUsingReuseID in Swift

gistfile1.swift

import UIKit

class ExpenseListViewController : UITableViewController, UITableViewDataSource, UITableViewDelegate {
    
    struct TableViewCellIdentifiers {
        static let BasicCell = "BasicCell"
    }
    
    // MARK: - UITableViewDataSource
    
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 10;
    }
    
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    // FIXME: What I don't like about this implementation is that I'm duplicating the "desgin" of the "Basic" cell in the storyboard and here in the else branch. I want to keep the storyboard version as it lets me make a segue. Preferably I'd have the app crash if the storyboard design was not available. I could do that by explicitly unpacking the optional I get back from dequeueReusableCellWithIdentifier but that feels "wrong" -- feedback welcome.
    let cellReuseID = TableViewCellIdentifiers.BasicCell
    if let cell = tableView.dequeueReusableCellWithIdentifier(cellReuseID) as? UITableViewCell {
    return self.configureCell(cell, indexPath: indexPath)
            } else {
    let newCell = UITableViewCell(style: .Default, reuseIdentifier: cellReuseID);
    return self.configureCell(newCell, indexPath: indexPath)
            }
        }
    // MARK: - Private
    func configureCell(cell: UITableViewCell, indexPath: NSIndexPath) -> UITableViewCell {
            cell.textLabel.text = "Row \(indexPath.row)"
    return cell
        }
}