syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"bound_tys:"}]}
source_snippet:     bound_tys: &'tcx ty::List<Ty<'tcx>>,
context_before:     def_id: DefId,
context_after: ) -> &'tcx ty::List<ty::ArgOutlivesPredicate<'tcx>> {