void print() {
void print(int pos) { System.out.print(pos+": ");
    void print() {      System.out.print(isMoved() ? 'm' : '-');      System.out.print(locked ? '*' : '-');      System.out.print(mergePartner!=null ? 'p' : '-');      System.out.print(' ' + node.getContent().toString() + ' ');      System.out.println( inserts.toString() );    }