requireNonNull(notificationContent);
requireNonNull(eventTime);
final Element baseNotification = notificationContent.getDocumentElement();
final Element entireNotification = notificationContent.createElementNS(
requireNonNull(notificationContent);
requireNonNull(eventTime);
final Element baseNotification = notificationContent.getDocumentElement();
final Element entireNotification = notificationContent.createElementNS(