ticketManAtWork.swift

let ticket = ticketMan.ticket

//put this inside a loop
if self.ticketMan.validateTicket(ticket) == false {
    self.ticketMan.ripTicket(ticket) // destroy ticket
    return // escape from function
}

//this is the end of the highlighting function
dispatch_sync(dispatch_get_main_queue()) { () -> Void in
    self.ticketMan.ripTicket(ticket) // return ticket
    completion(finished: true)
}