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/**     Return the difrence of 2 dates in minutes         
- parameter fromDate: The first date for the comparison     
- parameter toDate: The second date for the comparison 
*/ 
func dateDiffInMinutes(_ fromDate: Date, toDate: Date) -> Int {    
  return (Calendar.current as NSCalendar).components(.minute, from: fromDate, to: toDate, options: NSCalendar.Options(rawValue: 0)).minute! 
}