code: def _load_options(self, container, **options):
          
          # Force set dict option if available in backend. For example,
          # options["object_hook"] will be OrderedDict if 'container' was
          # OrderedDict in JSON backend.
          for opt in self.dict_options():
              options.setdefault(opt, container)
  
          return anyconfig.utils.filter_options(self._load_opts, options)
docs: Select backend specific loading options.