public IOContainer append(Collection<IOObject> output){
  List<IOObject> newObjects=new LinkedList<>();
  newObjects.addAll(output);
  newObjects.addAll(ioObjects);
  return new IOContainer(newObjects);
}

public IOContainer append ( Collection < IOObject > output ) { List < IOObject > newObjects = new LinkedList < > ( ) ; newObjects . addAll ( output ) ; newObjects . addAll ( ioObjects ) ; return new IOContainer ( newObjects ) ; }
appends this container ' s ioobjects to output .
