{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"impl<'mir,"}]}
impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
    fn new(body: &'mir Body<'tcx>, tcx: TyCtxt<'tcx>) -> ConstPropagator<'mir, 'tcx> {