func performSegueWithIdentifier(_ identifier:String, sender sender:AnyObject?)
Initiates the segue with the specified identifier from the current view controller's storyboard file
Identifier: String that identifies the triggered segue
Sender: The object that will initiate the segue.
Performing a segue with identifier "SomeSpecificIdentifier" from a table view row selection:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("SomeSpecificIdentifier", sender: indexPath.item)
}