look inside :ref when searching for default for :map child #2357

Job	Run time
Babashka	22s
ClojureScript (none)	2m 49s
ClojureScript (advanced)	3m 12s
Clojure 11 (Java 8)	1m 1s
ClojureScript (cherry-none)	3m 49s
Clojure 12 (Java 8)	2m 5s
ClojureScript (cherry-advanced)	3m 32s
Clojure 11 (Java 11)	56s
Clojure 12 (Java 11)	57s
Clojure 11 (Java 17)	58s
Clojure 12 (Java 17)	52s
Clojure 11 (Java 21)	49s
Clojure 12 (Java 21)	50s
	22m 12s

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