code: def resolve_loader(self, meta: SceneDescription):
          
          for loader_cls in self._loaders:
              if loader_cls.supports_file(meta):
                  meta.loader_cls = loader_cls
                  break
          else:
              raise ImproperlyConfigured(
                  "Scene {} has no loader class registered. Check settings.SCENE_LOADERS".format(meta.path))
docs: Resolve scene loader based on file extension