static int transfer(InputStream from, OutpuStream tothrows IOException
{
  int transferred = 0;
  with(: from with(: to ) //both throw an IOException
  {
    int read;
    while( (read = from.read() ) >= 0//throws IOException
    {
      to.write((byteread)//throws IOException
      transferred++;
    }
    return transferred; // returns from enclosingElement == transfer
  }
  // Compile-Time error: unreachable statement
  // because either IOException is re-thrown
  // or it will returned from inside the block
  out.printf("Bytes transferred: %d\n", transferred);
}