title: accessing map value by namespaced keyword
body: <p>given a map in clojure, <code>{::my-func {:meta {...}, :fn #function[hugsql.core/db-fn*]}</code>, automagically defined, how do I retrieve :fn value?</p>
  <p>I've tried</p>
  <pre><code>(get-in map [:my-func :fn])
  (get-in map [::my-func :fn])
  (get-in map [:current-namespace/my-func :fn])
  (get-in map [:namespaces-it-could-be/my-func :fn])
  </code></pre>
  <p>this is in context of hugsql/map-of-db-fns and hugsql/def-db-fns.</p>