| ⇢ | A | Version20190803075514 added | |
| ⇢ | A | ApiExceptionSubscriber added |
| ⇢ | A | ApiExceptionSubscriber::onExceptionEvent() added | |
| ⇢ | A | Version20190803075514::down() added | |
| ⇢ | A | Version20190803075514::getDescription() added | |
| ⇢ | A | Version20190803075514::up() added | |
| ⇢ | A | Lesson::setEmbedType() added | |
| ⇢ | A | Lesson::getEmbedType() added | |
| ⇢ | A | ApiExceptionSubscriber::getSubscribedEvents() added |