{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(iter) = self { Some(&*tcx.arena.alloc_from_iter(iter)) } else { None }
    fn process_decoded(self, tcx: TyCtxt<'tcx>, _err: impl Fn() -> !) -> Option<&'tcx [T]> {
    }