package Ġorg . be ck n . one . sandbox . b ap . client . external Ċ Ċ import Ġorg . be ck n . protocol . schemas . Protocol Ack Response Ċ import Ġorg . be ck n . protocol . schemas . ResponseStatus Ċ import Ġorg . springframework . http . HttpStatus Ċ import Ġretrofit 2 . Response Ċ Ċ fun Ġ< T > ĠResponse < T >. is InternalServerError () Ġ= Ġthis . code () Ġ== ĠHttpStatus . INTERNAL _ SERVER _ ERROR . value () Ċ Ċ fun Ġ< T > ĠResponse < T >. has Body () Ġ= Ġthis . body () Ġ!= Ġnull Ċ Ċ fun ĠResponse < Protocol Ack Response >. is Ack Negative () Ġ= Ġthis . body () !!. message . ack . status Ġ== ĠResponse Status . N ACK