| ⇢ | A | CleanExamData added |
| ⇢ | A | CleanExamData::handle() added | |
| ⇢ | A | CleanExamData::__construct() added | |
| B | ↗ | A | ExaminationStudentsController::setIsTakingExam() improved |
| A | ↛ | ExaminationCheck::process() removed | |
| A | ↛ | ExaminationCheck::deleteDuplication() removed |