private List<PickerAssignee> convertToPickerAssignees(TurboIssue issue, List<TurboUser> users) {
   return users
       .stream()
       .map(
           user -> {
             PickerAssignee convertedAssignee = new PickerAssignee(user);
             if (isExistingAssignee(issue, convertedAssignee)) {
               convertedAssignee.setExisting(true);
             }
             return convertedAssignee;
           })
       .sorted()
       .collect(Collectors.toList());
 }