private UUID getUUID(UUID uuid, String name)
   {
      return uuid == null ? UUID.nameUUIDFromBytes(name.getBytes()) : uuid;
   }
private UUID getUUID ( UUID uuid , String name ) { return uuid == null ? UUID . nameUUIDFromBytes ( name . getBytes ( ) ) : uuid ; }
Utility method. In some cases older compressed PPX files only have a name (or other string attribute)
but no UUID. This method ensures that we either use the UUID supplied, or if it is missing, we
generate a UUID from the name.

@param uuid uuid from object
@param name name from object
@return UUID instance