{"ast_node_type":"function","tokens":[{"end":74,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_local(&mut self, l: Local, ctxt: PlaceContext, _: Location) {
impl<'tcx> Visitor<'tcx> for IsReturnPlaceRead {
        if l == mir::RETURN_PLACE && ctxt.is_use() && !ctxt.is_place_assignment() {