{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":")"}]}
    ) -> Arc<chalk_solve::rust_ir::CoroutineDatum<Interner>> {
        id: chalk_ir::CoroutineId<Interner>,
        let InternedCoroutine(parent, expr) = self.db.lookup_intern_coroutine(id.into());