<cemerick> (-> {:a 1} first class supers)
<sexpbot> ⟹ #{java.util.RandomAccess java.util.Map$Entry
java.io.Serializable java.lang.Object java.util.concurrent.Callable
clojure.lang.AFn clojure.lang.IMapEntry java.util.Collection
clojure.lang.Seqable clojure.lang.IPersistentStack
clojure.lang.Sequential clojure.lang.APersistentVector
java.lang.Runnable clojure.lang.ILookup clojure.lang.AMapEntry
java.lang.Comparable clojure.lang.Associative java.lang.Iterable
clojure.lang.IPersistentCollection clojure.lang.IPersistentVector
clojure.lang.IFn clojure.lang.Counted clojure.lang.Indexed
clojure.lang.Reversible java.util.List}