rsubseq

(rsubseq sc test key) / (rsubseq sc start-test start-key end-test end-key)

clojure.core/rsubseq: subseq walking backwards: with a < or <= test the walk starts at key, with any other at the last member; the five-argument form starts at the end bound and runs while the start bound holds. A strict list, nil when nothing passes. As a value three or five arguments.