byte[] left = in.getBytes( 1L, leftLength );
byte[] right = inout[0].getBytes( 1L, rightLength );
byte[] retval = new byte[ leftLength + rightLength ];
System.arraycopy( left, 0, retval, 0, leftLength );
System.arraycopy( right, 0, retval, leftLength, rightLength );
inout[0] = new HarmonySerialBlob( retval );
out[0] = new HarmonySerialBlob( new byte[] { (byte) 1, (byte) 2, (byte) 3 } );
}