Can assoc map or vector while remaining a bean

[mfikes]

This shows how two maps that are {:a 1, :b {:x 2}} can turn into two different JavaScript representations. The problem is that assoc on a bean can assoc a non-primitive value without it snapshotting to a regular persistent data structure.

cljs.user=> (require '[cljs-bean.core :refer [->clj ->js]])
nil
cljs.user=> (->js {:a 1 :b {:x 2}})
#js {:a 1, :b #js {:x 2}}
cljs.user=> (assoc (->clj #js {:a 1}) :b {:x 2})
{:a 1, :b {:x 2}}
cljs.user=> (->js *1)
#js {:a 1, :b {:x 2}}