}

    @Override
    public boolean accept(ChangeVisitor visitor) {
        ChangeDetectingVisitor changeDetectingVisitor = new ChangeDetectingVisitor(visitor);
        for (ChangeContainer source : sources) {
            if (!source.accept(changeDetectingVisitor)) {
                return false;
            }
            if (changeDetectingVisitor.isChangesDetected()) {
                return true;
            }
        }