SegueCatalog/MasterViewController.swift

/*
    Copyright (C) 2016 Apple Inc. All Rights Reserved.
    See LICENSE.txt for this sample’s licensing information
    
    Abstract:
    The view controller used as the root of the split view's master-side navigation controller.
*/
 
import UIKit
 
class MasterViewController: UITableViewController {
    @IBAction func unwindInMaster(_ segue: UIStoryboardSegue)  {
        /*
            Empty. Exists solely so that "unwind in master" segues can
            find this instance as a destination.
        */
    }
}