for(final OperatorIDTuple<Operator> opIDt : this.succeedingOperators) {
final String text = (opIDt.getId() == 0) ? "left" : "right";
final GraphWrapper gw = new GraphWrapperOperator(opIDt.getOperator());
final AbstractGuiComponent<Operator> element = new OptionalPanel(this, gw, parent, text, opIDt.getOperator());
this.annotationLabels.put(opIDt.getOperator(), element);
lineLables.put(gw, element);
}