| ⇢ | A | AddOwnerAfterUserAddedHandler added | |
| ⇢ | A | SendOwnerMomentHandler added |
| ⇢ | A | AddOwnerAfterUserAddedHandler::handle() added | |
| ⇢ | A | AddOwnerAfterUserAddedHandler::trigger() added | |
| ⇢ | A | SendOwnerMomentHandler::handle() added | |
| ⇢ | A | SendOwnerMomentHandler::trigger() added | |
| A | ↘ | B | MomentPresenter::icon() got worse |