code: public void writeRawLittleEndian64(final long value) throws IOException {
      writeRawByte((int)(value      ) & 0xFF);
      writeRawByte((int)(value >>  8) & 0xFF);
      writeRawByte((int)(value >> 16) & 0xFF);
      writeRawByte((int)(value >> 24) & 0xFF);
      writeRawByte((int)(value >> 32) & 0xFF);
      writeRawByte((int)(value >> 40) & 0xFF);
      writeRawByte((int)(value >> 48) & 0xFF);
      writeRawByte((int)(value >> 56) & 0xFF);
    }
docs: Write a little-endian 64-bit integer.