syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
source_snippet: impl<'tcx> Visitor<'tcx> for PackedRefChecker<'_, 'tcx> {
context_after:     fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) {