syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"impl<'o,"}]}
source_snippet: impl<'o, 'tcx> TraitObligationStackList<'o, 'tcx> {
context_after:     fn empty(cache: &'o ProvisionalEvaluationCache<'tcx>) -> TraitObligationStackList<'o, 'tcx> {