I think usually the sender is implicit (the calling context) so it could me omitted. Racket [1] has a non conventional syntax too. [1] https://docs.racket-lan

I think usually the sender is implicit (the calling context) so it could me omitted. Racket [1] has a non conventional syntax too. [1] https://docs.racket-lang.org/reference/ivaraccess.html#%28form._%28%28lib._racket%2Fprivate%2Fclass-internal..rkt%29._send%29%29 https://docs.racket-lang.org/reference/ivaraccess.html#%28fo...