private NotificationTaskTO findNotificationTaskBySender(final String sender) {
PagedResult<NotificationTaskTO> tasks = taskService.list(TaskType.NOTIFICATION);
assertNotNull(tasks);
assertFalse(tasks.getResult().isEmpty());
NotificationTaskTO taskTO = null;
for (NotificationTaskTO task : tasks.getResult()) {
if (sender.equals(task.getSender())) {
taskTO = task;
}
}