docs: public FilterCellFastStr findNextCellWithLength(int hashcode, int length) {
          if (nextCell == null) {
              return null;
          }
  
          FilterCellFastStr x = (FilterCellFastStr) nextCell.get(hashcode);
  
          if (x != null) {
              if (x.getHashLength() != length) {
                  return null;
              }
          }
  
          return x;
      }