{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"Box::new(AggregateKind::Coroutine(coroutine_def_id,"}]}
        Box::new(AggregateKind::Coroutine(coroutine_def_id, coroutine_args)),
    let rvalue = Rvalue::Aggregate(
        IndexVec::from_raw(fields),