| ⇢ | A | BaseCommand added | |
| ⇢ | A | PingCommand added | |
| ⇢ | A | PingHandler added | |
| A | ↛ | Command removed |
| ⇢ | A | PingHandler::handle() added | |
| ⇢ | A | BaseCommand::getHandler() added | |
| ⇢ | A | BaseCommand::loadFromRequest() added | |
| ⇢ | A | BaseCommand::getRequestData() added | |
| ⇢ | A | PingCommand::rules() added | |
| ⇢ | A | PingCommand::setAnswer() added | |
| ⇢ | A | PingCommand::getAnswer() added | |
| A | ↛ | Command::getHandler() removed | |
| A | ↛ | Command::loadFromRequest() removed | |
| A | ↛ | Command::getRequestData() removed |