docs: long get(long key) {
          long k = key;
          long[] tab = table;
          int len = tab.length;
          int i = hash(k, len);
          while (true) {
              long item = tab[i];
              if (item == k)
                  return tab[i + 1];
              if (item == 0)
                  return 0;
              i = nextKeyIndex(i, len);
          }
      }