(admix mix ch)
Adds ch as an input to the mix
user=> (def ch-out (chan))
#'user/ch-out
user=> (def mix-out (mix ch-out))
#'user/mix-out
user=> (def ch-example1 (chan))
#'user/ch-example1
user=> (def ch-example2 (chan))
#'user/ch-example2
user=> (admix mix-out ch-example1)
true
user=> (admix mix-out ch-example2)
true
user=> (put! ch-example1 "sent to chan 1")
true
user=> (put! ch-example2 "sent to chan 2")
true
user=> (<!! ch-out)
"sent to chan 1"
user=> (<!! ch-out)
"sent to chan 2"