{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"///"}]}
    /// `Err(AlwaysRequiresDrop)` is returned.
    /// freeing up memory). If the ADT is known to have a significant destructor then
    query adt_significant_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {