{"ast_node_type":"variable","tokens":[{"end":36,"kind":"keyword","start":0,"text":"let"}]}
    let patch = MirPatch::new(body);
pub(super) fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
    let mut checker = DerefChecker { tcx, patcher: patch, local_decls: &body.local_decls };