| C | ↗ | B | MessagesHandler improved |
| ⇢ | A | create_room() added | |
| ⇢ | A | create_other_room_wo_check() added | |
| ⇢ | A | create_other_room() added | |
| ⇢ | A | create_self_room() added | |
| ⇢ | A | evaluate() added | |
| A | ↛ | MessagesHandler.create_room() removed | |
| A | ↛ | create_room_users() removed | |
| A | ↛ | MessagesHandler.evaluate() removed |