{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"known_type_outlives_obligations:"}]}
    known_type_outlives_obligations: &'a [ty::PolyTypeOutlivesPredicate<'tcx>],
    region_bound_pairs: &'a RegionBoundPairs<'tcx>,
    reported_errors: FxIndexSet<(Ty<'tcx>, Span)>,