{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"impl<'a,"}]}
impl<'a, 'tcx> MutVisitor<'tcx> for Promoter<'a, 'tcx> {
/// Replaces all temporaries with their promoted counterparts.
    fn tcx(&self) -> TyCtxt<'tcx> {