class ShiftCipher:

$"""$

ShiftCipher are objects that can encrypt and decode text messages based on a specific shift length.

$"""$

def $\_\_$init$\_\_($self$,$ shift$)$:

$"""$

Constructs a ShiftCipher for the specified degree of shift $($positive or negative$),$

by building a cipher $($dictionary mapping from letters to other letters$)$ and

a decipher $($the inverse of the cipher$).$

$"""$

$...$

def transform$\_$message$($self$,$ message, cipher$)$:

$"""$

Transforms a message using the specified cipher. Is not called by users directly

and can be called with either the cipher $($to encrypt$)$ or the decoder $($to decode$).$

$"""$

$...$

def encrypt$($self$,$ message$)$:

$"""$

Transforms a message using the cipher, by calling self.transform$\_$message.

$"""$

$...$

def decode$($self$,$ message$)$:

$"""$

Transforms a message using the decoder, by calling self.transform$\_$message.

$"""$

$...$

If m$3$ is a ShiftCipher object, and you execute the code m$3.$encrypt$($test$),$ what is the self parameter in the encrypt method?