syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> ImplSourceUserDefinedData<'tcx, PredicateObligation<'tcx>> {
context_before:         impl_def_id: DefId,
context_after:         debug!(?obligation, ?impl_def_id, "confirm_impl_candidate");