- Map<String, Map<String, String>> serviceToRefs = retVal.get(namespace);
- if(serviceToRefs==null) {
- serviceToRefs = Maps.newHashMap();
- retVal.put(namespace, serviceToRefs);
- }
+ Map<String, Map<String, String>> serviceToRefs =
+ retVal.computeIfAbsent(namespace, k -> new HashMap<>());