How can I pretty print a PersistentHashMap in Clojure to a string?

Question

How can I pretty print a PersistentHashMap in Clojure to a string? I am looking for something like:

(str (pprint {... hash map here...})

which

Answer 1

(pr-str {:a 1 :b 2}) ;; => "{:a 1, :b 2}"