{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
        let num_missing_args = self.num_missing_type_or_const_args();
    fn suggest_adding_type_and_const_args(&self, err: &mut Diag<'_, impl EmissionGuarantee>) {
        let msg = format!("add missing {} argument{}", self.kind(), pluralize!(num_missing_args));