BLPOP is a blocking list pop primitive. It is the blocking version of LPOP because it blocks
the connection when there are no elements to pop from any of the given lists.
Jan Krüger, Sönke Ludwig, Michael Eisendle, Etienne Cimon
© 2012-2016 RejectedSoftware e.K.
Subject to the terms of the MIT license, as written in the included LICENSE.txt file.