public void test_3() throws Exception {
String input = "{'map':{}}";
DefaultExtJSONParser parser = new DefaultExtJSONParser(input, ParserConfig.getGlobalInstance(), JSON.DEFAULT_PARSER_FEATURE);
DefaultObjectDeserializer deser = new DefaultObjectDeserializer();
SortedMap<String, ConcurrentMap> map = JSON.parseObject(input, new TypeReference<SortedMap<String, ConcurrentMap>>() {
}.getType());
Assert.assertEquals(ConcurrentHashMap.class, map.get("map").getClass());