{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
    let mut indexer = Indexer { node_id_to_def_id, index: IndexVec::new() };
) -> IndexVec<LocalDefId, AstOwner<'a>> {
    *indexer.index.ensure_contains_elem(CRATE_DEF_ID, || AstOwner::NonOwner) =