{"ast_node_type":"function","tokens":[{"end":42,"kind":"keyword","start":0,"text":"fn"}]}
    fn o1<T>(x: T) -> WithMinOptLevel<T> {
pub(crate) fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
        WithMinOptLevel(1, x)