protected function populate(int $project_id, &$project)
 {
     if ($project == null) {
         $project = new logistic_project((int) $project_id);
         $project->set_name($this->unmarshal($this->db->f('name'), 'string'));
         $project->set_description($this->unmarshal($this->db->f('description'), 'string'));
         $project->set_project_type_id($this->unmarshal($this->db->f('project_type_id'), 'int'));
         if ($project->get_project_type_id() && $project->get_project_type_id() > 0) {
             $project->set_project_type_label($this->get_project_type_label($this->unmarshal($this->db->f('project_type_id'), 'int')));
         }
         $project->set_start_date($this->unmarshal($this->db->f('start_date'), 'int'));
         $project->set_end_date($this->unmarshal($this->db->f('end_date'), 'int'));
     }
     return $project;
 }