public Builder groups(List<String> groups) {
   emailNotification.setGroups(groups);
   return this;
 }
 public Builder users(List<String> users) {
   emailNotification.setUsers(users);
   return this;
 }
 public Builder body(String body) {
   emailNotification.setBody(body);
   return this;
 }
 public Builder subject(String subject) {
   emailNotification.setSubject(subject);
   return this;
 }
 public Builder replyTo(String replyTo) {
   emailNotification.setReplyTo(replyTo);
   return this;
 }
 public Builder from(String from) {
   emailNotification.setFrom(from);
   return this;
 }