code: public void delete(RecordId nextDeletedSlot) {
  		Constant flag = EMPTY_CONST;
  		setVal(currentPos(), flag);
  		setNextDeletedSlotId(nextDeletedSlot);
  	}
docs: Deletes the current record. Deletion is performed by marking the record
  as "deleted" and setting the content as a pointer points to next deleted
  slot.
  
  @param nextDeletedSlot
  the record is of next deleted slot