{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
impl<'tcx> MutVisitor<'tcx> for RenameToReturnPlace<'tcx> {
/// Replaces all uses of `self.to_rename` with `_0`.
    fn tcx(&self) -> TyCtxt<'tcx> {