{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"(instance,"}]}
    (instance, mode): (Instance<'tcx>, CollectionMode),
    tcx: TyCtxt<'tcx>,
) -> (&'tcx [Spanned<MonoItem<'tcx>>], &'tcx [Spanned<MonoItem<'tcx>>]) {