Also reader macro: @ref/@agent/@var/@atom/@delay/@future. Within a transaction, returns the in-transaction-value of ref, else returns the most-recently-committed value of ref. When applied to a var, agent or atom, returns its current state. When applied to a delay, forces it if not already forced. When applied to a future, will block if computation not complete
; clojure/core.clj:1278 (defn deref [#^clojure.lang.IDeref ref] (.deref ref))
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