{"ast_node_type":"function","tokens":[{"end":87,"kind":"keyword","start":0,"text":"fn"}]}
    fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) {
impl<'tcx> Visitor<'tcx> for GatherUsedMutsVisitor<'_, '_, '_, 'tcx> {
        debug!("visit_terminator: terminator={:?}", terminator);