{"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_local(&mut self, local: Local, context: PlaceContext, _: Location) {
impl<'a, 'tcx> Visitor<'tcx> for DefUseVisitor<'a, 'tcx> {
        let local_ty = self.body.local_decls[local].ty;