public static synchronized @NotNull JBCefFpsMeter register(@NotNull String id) {
    JBCefFpsMeter instance = INSTANCES.get(id);
    if (instance != null) {
      return instance;
    }
    instance = new JBCefFpsMeterImpl(id);
    INSTANCES.put(id, instance);
    return instance;
  }
public static synchronized @NotNull JBCefFpsMeter register(@NotNull String id)