private function getKanbanTitle()
{
$old_kanban_title = $this->config_manager->getKanbanTitle($this->project_id);
$kanban_title = trim($this->request->get('kanban-title-admin'));
if ($kanban_title !== $old_kanban_title) {
$this->response->kanbanTitleChanged();
}
if ($kanban_title == '') {
$this->response->emptyKanbanTitle();
$kanban_title = $old_kanban_title;
}
return $kanban_title;
}