Inspection detects calls to Map.get which could be replaced with computeIfAbsent.

Map.computeIfAbsent method could be used to replace the code like this:

      List<String> list = map.get(key);
      if (list == null) {
        list = new ArrayList<>();
        map.put(key, list);
      }

This conversion is available since Java 8 only.

New in 2016.3