syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"existential_predicates:"}]}
source_snippet:     existential_predicates: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,
context_before:     tcx: TyCtxt<'tcx>,
context_after: ) -> Vec<ty::Region<'tcx>> {