code: def get(cls, backend_id):
          
  
          for backend_class in cls._get_backends_classes():
              if backend_class.id == backend_id:
                  return backend_class.create()
  
          raise InvalidBackendError(
              cls.backend_type,
              backend_id,
              get_installed_pools()[cls.backend_type]
          )
docs: Return an instance of backend type