def get_extra_context(self, request):
        """Return extra context parameters for add/change views."""

        extra_context = {
            "request": request,
            "model": self.model,
            "available_templates": getattr(self.model, "_feincms_templates", ()),
            "has_parent_attribute": hasattr(self.model, "parent"),
            "content_types": self.get_content_type_map(request),
            "FEINCMS_CONTENT_FIELDSET_NAME": FEINCMS_CONTENT_FIELDSET_NAME,
        }

        for processor in self.model.feincms_item_editor_context_processors:
            extra_context.update(processor(request))

        return extra_context
Return extra context parameters for add/change views.
feincms/admin/item_editor.py