user=> bytes
java.lang.Exception: Unable to resolve symbol: bytes in this context (NO_SOURCE_FILE:0)
user=> (defmulti bytes identity)
#'user/bytes
user=> (defmethod bytes :default [x] (println x))
java.lang.IllegalArgumentException: No matching method: addMethod (NO_SOURCE_FILE:3)
user=> (defmulti bbbytes identity)
#'user/bbbytes
user=> (defmethod bbbytes :default [x] (println x))
#<MultiFn clojure.lang.MultiFn@ba9340>
user=> (defn bytes [x] (println x))
#'user/bytes