public function getByProject($projectId, $includeContent = false)
    {
        $projectId = (int) $projectId;
        if ($projectId <= 0) {
            throw new Exception('Invalid param project_id');
        }
        $includeContent = (bool) $includeContent;
        return $this->rest->get("projects/$projectId/$this->action", [
          'includeContent'=>$includeContent ? 'true' : 'false'
        ]);
    }