1.300总吨至500总吨的船舶，赔偿责任限额为500000计算单位；
Rather than fully removing the key from the map, we set the register value to null. The metadata is kept around so we can disambiguate deletions from states that simply don’t have a key yet. These are called tombstones — the ghosts of CRDTs past.
，更多细节参见同城约会
В Домодедово задержали иностранца с куском метеорита в чемодане14:57
tag-bytes (mapv #(tag/tag-bytes (key %)) sorted-entries)