private function getScrumTrackerIds(Project $project) { $planning_tracker_ids = $this->planning_factory->getPlanningTrackerIdsByGroupId($project->getID()); $backlog_tracker_ids = $this->planning_factory->getBacklogTrackerIdsByGroupId($project->getID()); return array_unique(array_merge($planning_tracker_ids, $backlog_tracker_ids)); }