syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"impl<'p,"}]}
source_snippet: impl<'p, 'tcx> Visitor<'p, 'tcx> for MatchVisitor<'p, 'tcx> {
context_before: // appropriate.
context_after:     fn thir(&self) -> &'p Thir<'tcx> {