title: Swift: Trying to print "Double Sided" UIPrintInfo.Duplex.longEdge but not working
body: <p>I am trying to print PDF double side in iOS app, for that setting         printInfo.duplex = UIPrintInfo.Duplex.longEdge, but it is ignored when I print using UIPrintInteractionController</p>
  <pre><code>    printInfo.printerID = &quot;c890E8700000.local&quot;
      printInfo.jobName = lastPathComponent
      printInfo.duplex = UIPrintInfo.Duplex.longEdge
      printInfo.orientation = UIPrintInfo.Orientation.portrait
      printInfo.outputType = UIPrintInfo.OutputType.general
      
      
      print(printInfo.dictionaryRepresentation)
  
  
      // this is what I see in debug print
      Optional([
        AnyHashable(&quot;UIPrintInfoPrinterIDKey&quot;): c890E8700000.local,
        AnyHashable(&quot;UIPrintInfoJobNameKey&quot;): 02180830225_bg.pdf
      ])
  </code></pre>