docs: protected String printList()
    {
      String output = "[";
      
      SimpleEntry pointer = first;
      int counter = 0;
      while((pointer != null) && (counter < 3))
      {
        output += "@"+Integer.toHexString(pointer.hashCode());
        pointer = pointer.next;
        if(pointer != null)
          output +=  ", ";
        counter++;
      }
      if(pointer != null)
      {
        output += "..., @"+Integer.toHexString(last.hashCode()) + "]";
      }
      else
        output += "]";
      
      return output;
    }