digraph emptyWhen_kt {
    graph [nodesep=3]
    node [shape=box penwidth=2]
    edge [penwidth=2]

    subgraph cluster_0 {
        color=red
        0 [label="Enter function test_1" style="filled" fillcolor=red];
        subgraph cluster_1 {
            color=blue
            2 [label="Enter when"];
            4 [label="Synthetic else branch"];
            3 [label="Exit when"];
        }
        1 [label="Exit function test_1" style="filled" fillcolor=red];
    }
    0 -> {2};
    2 -> {4};
    3 -> {1};
    4 -> {3};

    subgraph cluster_2 {
        color=red
        5 [label="Enter function test_2" style="filled" fillcolor=red];
        subgraph cluster_3 {
            color=blue
            7 [label="Enter when"];
            9 [label="Access variable R|<local>/x|"];
            10 [label="Synthetic else branch"];
            8 [label="Exit when"];
        }
        6 [label="Exit function test_2" style="filled" fillcolor=red];
    }
    5 -> {7};
    7 -> {9};
    8 -> {6};
    9 -> {10};
    10 -> {8};

    subgraph cluster_4 {
        color=red
        11 [label="Enter function test_3" style="filled" fillcolor=red];
        subgraph cluster_5 {
            color=blue
            13 [label="Enter when"];
            15 [label="Access variable R|<local>/x|"];
            16 [label="Variable declaration: lval y: R|kotlin/Int|"];
            17 [label="Synthetic else branch"];
            14 [label="Exit when"];
        }
        12 [label="Exit function test_3" style="filled" fillcolor=red];
    }
    11 -> {13};
    13 -> {15};
    14 -> {12};
    15 -> {16};
    16 -> {17};
    17 -> {14};

}