| ⇢ | A | Migration_Tracker_Add_Site_Custom added | |
| A | ↘ | B | Batoto got worse |
| ⇢ | C | Batoto::doCustomCheck() added | |
| ⇢ | A | Migration_Tracker_Add_Site_Custom::up() added | |
| ⇢ | A | Migration_Tracker_Add_Site_Custom::__construct() added | |
| ⇢ | A | Migration_Tracker_Add_Site_Custom::down() added |