We get a crash instead.
Trace:
PHP Fatal error: Uncaught Error: Class "Tuleap\BotMattermostGit\SenderServices\AttachmentPreTextPresenter" not found in /usr/share/tuleap/plugins/botmattermost_git/include/BotMattermostGit/SenderServices/PullRequestNotificationBuilder.php:68
Stack trace:
#0 /usr/share/tuleap/plugins/botmattermost_git/include/BotMattermostGit/SenderServices/PullRequestNotificationBuilder.php(49): Tuleap\BotMattermostGit\SenderServices\PullRequestNotificationBuilder->makePreText()
#1 /usr/share/tuleap/plugins/botmattermost_git/include/BotMattermostGit/SenderServices/PullRequestNotificationSender.php(65): Tuleap\BotMattermostGit\SenderServices\PullRequestNotificationBuilder->buildNotificationAttachment()
#2 /usr/share/tuleap/plugins/botmattermost_git/include/botmattermost_gitPlugin.php(145): Tuleap\BotMattermostGit\SenderServices\PullRequestNotificationSender->send()
#3 /usr/share/tuleap/src/common/Event/EventManager.class.php(127): botmattermost_gitPlugin->pullrequest_hook_create_pull_request()