docs: static long longFromByteArray(byte[] bytes, int offset) {
      Utils.checkArgument(bytes.length >= offset + LONG_BYTES, "array too small");
      return (bytes[offset] & 0xFFL) << 56
          | (bytes[offset + 1] & 0xFFL) << 48
          | (bytes[offset + 2] & 0xFFL) << 40
          | (bytes[offset + 3] & 0xFFL) << 32
          | (bytes[offset + 4] & 0xFFL) << 24
          | (bytes[offset + 5] & 0xFFL) << 16
          | (bytes[offset + 6] & 0xFFL) << 8
          | (bytes[offset + 7] & 0xFFL);
    }