Add class methods to retrieve instances
Add class methods to retrieve instances

Fixed relation between models

gateway4labs/labmanager,porduna/labmanager,gateway4labs/labmanager,gateway4labs/labmanager,morelab/labmanager,morelab/labmanager,labsland/labmanager,go-lab/labmanager,labsland/labmanager,porduna/labmanager,porduna/labmanager,morelab/labmanager,go-lab/labmanager,porduna/labmanager,gateway4labs/labmanager,go-lab/labmanager,morelab/labmanager,labsland/labmanager,go-lab/labmanager,labsland/labmanager