code: public byte[] getBytes() {
      byte[] bytes = new byte[SIZE];
      BigendianEncoding.longToByteArray(idHi, bytes, 0);
      BigendianEncoding.longToByteArray(idLo, bytes, BigendianEncoding.LONG_BYTES);
      return bytes;
    }
docs: Returns the 16-bytes array representation of the {@code TraceId}.
  
  @return the 16-bytes array representation of the {@code TraceId}.
  @since 0.5