docs: public int set(int pos) {
  
          while (pos >= capacity) {
              doubleCapacity();
          }
  
          if (pos >= limitPos) {
              limitPos = pos + 1;
          }
  
          int windex = pos >> 5;
          int mask   = 0x80000000 >>> (pos & 0x1F);
          int word   = map[windex];
          int result = (word & mask) == 0 ? 0
                                          : 1;
  
          map[windex] = (word | mask);
  
          return result;
      }