code: def get_formset_kwargs(self):
          
          # Perform deprecation check
          if hasattr(self, 'save_as_new'):
              klass = type(self).__name__
              raise DeprecationWarning(
                  'Setting `{0}.save_as_new` at the class level is now '
                  'deprecated. Set `{0}.formset_kwargs` instead.'.format(klass)
              )
          kwargs = super(BaseInlineFormSetFactory, self).get_formset_kwargs()
          kwargs['instance'] = self.object
          return kwargs
docs: Returns the keyword arguments for instantiating the formset.