Artesonraju

(defrecord E [])
(extend-protocol IPrintWithWriter E (-pr-writer [this writer _] (write-all writer "#e" (into {} this))))

(def e (map->E {})) 
(print e) ; prints  #e{}
(pprint e) ; prints {}

Artesonraju

(def composite-data
  {:composite/item {:id 0
                    :width 400
                    :height 400
                    :color "#428BCA"
                    :counter {:id 0
                              :init 0}
                    :children [{:id 1
                                :width 200
                                :height 200

Artesonraju

;; =============================================================================
;; Composite

(def composite-data
  {:composite/item {:id 0
                   :width 400
                   :height 400
                   :color "#428BCA"
                   :children [{:id 1
                               :width 200