docs: protected void appendCopiesAfter(PointableRoaringArray highLowContainer, short beforeStart) {
  
      int startLocation = highLowContainer.getIndex(beforeStart);
      if (startLocation >= 0) {
        startLocation++;
      } else {
        startLocation = -startLocation - 1;
      }
      extendArray(highLowContainer.size() - startLocation);
  
      for (int i = startLocation; i < highLowContainer.size(); ++i) {
        this.keys[this.size] = highLowContainer.getKeyAtIndex(i);
        this.values[this.size] = highLowContainer.getContainerAtIndex(i).clone();
        this.size++;
      }
    }