docs: public ApnsPayloadBuilder setLocalizedAlertSubtitle(final String localizedAlertSubtitleKey, final String... alertSubtitleArguments) {
          this.localizedAlertSubtitleKey = localizedAlertSubtitleKey;
          this.localizedAlertSubtitleArguments = (alertSubtitleArguments != null && alertSubtitleArguments.length > 0) ? alertSubtitleArguments : null;
  
          this.alertSubtitle = null;
  
          return this;
      }