@SuppressWarnings("UnusedReturnValue")
  @NotNull
  public Notification notifyWarning(@NonNls @Nullable String displayId,
                                    @NotificationTitle @NotNull String title,
                                    @NotificationContent @NotNull String message) {
    return notifyWarning(displayId, title, message, new NotificationAction[0]);
  }
@SuppressWarnings("UnusedReturnValue")
  @NotNull
  public Notification notifyWarning(@NonNls @Nullable String displayId,
                                    @NotificationTitle @NotNull String title,
                                    @NotificationContent @NotNull String message)