def render_template(self, template, **kwargs):
        """
        Use this method on your own endpoints, will pass the extra_args
        to the templates.

        :param template: The template relative path
        :param kwargs: arguments to be passed to the template
        """
        kwargs["base_template"] = self.appbuilder.base_template
        kwargs["appbuilder"] = self.appbuilder
        return render_template(
            template, **dict(list(kwargs.items()) + list(self.extra_args.items()))
        )

        Use this method on your own endpoints, will pass the extra_args
        to the templates.

        :param template: The template relative path
        :param kwargs: arguments to be passed to the template
        
flask_appbuilder/baseviews.py