c.items = MapHandler.create_map();
c.items = new Map(); MapHandler.initialize(c.items);
    static void initialize_category_containers(java.lang.Object p0) {        Category c = (Category) p0;        if (c != null) {            java.lang.System.out.println("INFO: Initialize category containers.");            c.items = MapHandler.create_map();        } else {            java.lang.System.out.println("ERROR: Could not initialize category containers. The category is null.");        }    }