/**
  * A utility method that gets the contents as a {@link Cwt}.
  *
  * @return the CWT or null if no contents is available
  * @throws CBORException
  *           if the contents do not hold a valid CWT
  */
 public CWT GetCwt()
 {
     if (Content == null)
     {
         return(null);
     }
     return(CWT.Decode(Content));
 }