send: what channels you're interested in, a minimum time,
and a close time.
if the close time is negative, you are just polling curiously.
if it is zero, it will close after your next batch. (long polling)
anything else stays open for as long as it can in there.
send: what channels you're interested in, a minimum time, and a close time. if the close time is negative, you are just polling curiously. if it is zero, it will close after your next batch. (long polling) anything else stays open for as long as it can in there.