docs: public static void or(byte[] map, int pos, byte source, int count) {
  
          int shift = pos & 0x07;
          int mask  = (source & 0xff) >>> shift;
          int index = pos / 8;
  
          if (index >= map.length) {
              return;
          }
  
          byte b = (byte) (map[index] | mask);
  
          map[index] = b;
  
          if (shift == 0) {
              return;
          }
  
          shift = 8 - shift;
  
          if (count > shift) {
              mask           = ((source & 0xff) << 8) >>> shift;
              b              = (byte) (map[index + 1] | mask);
              map[index + 1] = b;
          }
      }