@NotNull
  private Pair<Collection<CustomCodeStyleSettings>, Map<String,Element>> getMaps() {
    synchronized (myCustomSettings) {
      return Pair.create(
        new ArrayList<>(myCustomSettings.values()),
        new HashMap<>(myUnknownCustomElements)
      );
    }
  }
@NotNull
  private Pair<Collection<CustomCodeStyleSettings>, Map<String,Element>> getMaps()