public override bool DidTapAtElement(PSPDFOutlineViewController outlineController, PSPDFOutlineElement outlineElement)
 {
     Console.WriteLine ("DidTapAtTocElement: " + outlineElement);
     return false;
 }
 public override bool DidTapAtElement(PSPDFOutlineViewController outlineController, PSPDFOutlineElement outlineElement)
 {
     Console.WriteLine("DidTapAtTocElement: " + outlineElement);
     return(false);
 }