---
source: hydroflow/tests/surface_fold_keyed.rs
expression: "df.meta_graph().unwrap().to_dot(&Default::default())"
---
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    n1v1 [label="(n1v1) source_stream(items_recv)", shape=invhouse, fillcolor="#88aaff"]
    n2v1 [label="(n2v1) fold_keyed::<\l    'tick,\l>(Vec::new, |old: &mut Vec<u32>, mut x: Vec<u32>| old.append(&mut x))\l", shape=invhouse, fillcolor="#88aaff"]
    n3v1 [label="(n3v1) for_each(|v| result_send.send(v).unwrap())", shape=house, fillcolor="#ffff88"]
    n4v1 [label="(n4v1) handoff", shape=parallelogram, fillcolor="#ddddff"]
    n2v1 -> n3v1
    n1v1 -> n4v1
    n4v1 -> n2v1 [color=red]
    subgraph "cluster n1v1" {
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        style=filled
        label = "sg_1v1\nstratum 0"
        n1v1
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        fillcolor="#dddddd"
        style=filled
        label = "sg_2v1\nstratum 1"
        n2v1
        n3v1
    }
}