docs: public static long getMaxUnsignedValueOnBytes(final int width) {
      if (width < 0 || width > 8) {
        throw new IllegalArgumentException("Width must be from 1 to 8 bytes: " 
            + width);
      }
      if (width < 8) {
        return ((long) 1 << width * Byte.SIZE) - 1;
      } else {
        return Long.MAX_VALUE;
      }
    }