private void prepareUpdatedGroupPickup() {
targetGroup = new ArrayList<String>();
sourceGroup = new ArrayList<String>();
for (UserGroup userGroup : registrationDao.findGroupsByUser(userToUpdate)) {
targetGroup.add(userGroup.getGroupName());
}
for (UserGroup group : registrationDao.findNotAssignedUserGroupsByUser(userToUpdate)) {
sourceGroup.add(group.getGroupName());
}
groupDefinitions = new DualListModel<String>(sourceGroup, targetGroup);
}
