{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
        let target_trait = self.expect_module(trait_def_id);
    ) -> Result<Vec<(Ident, Option<Ident>)>, Indeterminate> {
        if !target_trait.unexpanded_invocations.borrow().is_empty() {