{"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"fn"}]}
    fn notify(&self, err: &mut Diag<'_, impl EmissionGuarantee>) {
    /// Builds the `expected 1 type argument / supplied 2 type arguments` message.
        let (quantifier, bound) = self.get_quantifier_and_bound();