syntax_data: {"ast_node_type":"function","tokens":[{"end":85,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn visit_place(&mut self, place: &Place<'tcx>, ctxt: PlaceContext, _: Location) {
context_before:     #[tracing::instrument(level = "trace", skip(self))]
context_after:         if !ctxt.is_use() {