private void sendEmailToPersons(Set<Person> persons, String personsName, String subject, String body) {
if (!persons.isEmpty()) {
final Recipient recipient = new Recipient(getString("label.teachers"), UserGroup.of(Person.convertToUsers(persons)));
SystemSender systemSender = Bennu.getInstance().getSystemSender();
new Message(systemSender, systemSender.getConcreteReplyTos(), recipient.asCollection(), subject, body, "");
}
}
private void sendEmailWithConversationMessage(Set<Person> teachers, Set<Person> students,
ConversationMessage conversationMessage) {