{"ast_node_type":"function","tokens":[{"end":86,"kind":"keyword","start":0,"text":"fn"}]}
    fn assertion_auto(&mut self, item_id: LocalDefId, attr: &Attribute) -> Assertion {
    /// Gets the "auto" assertion on pre-validated attr, along with the `except` labels.
        let (name, mut auto) = self.auto_labels(item_id, attr);