| B | ↘ | C | SequenceResourceRepository got worse |
| ⇢ | B | SequenceResourceRepository::checkCourseRequirement... added | |
| ⇢ | A | SequenceResourceRepository::findVerticesEdges() added | |
| D | ↘ | F | CourseManager::delete_course() got worse |
| A | ↛ | SequenceResourceRepository::findSessionFromVertice... removed |