{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"for"}]}
    for (bcb, bcb_data) in graph.iter_enumerated() {
    // We only care about blocks that are part of the coverage graph.
        let make_raw_span = |raw_span: Span| RawSpanFromMir { raw_span, bcb };