{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"for"}]}
    for (idx, node) in pre_order_to_real.iter_enumerated() {
    let mut immediate_dominators = IndexVec::from_elem_n(None, graph.num_nodes());
        immediate_dominators[*node] = Some(pre_order_to_real[idom[idx]]);