digraph modules {
  node [shape = "box"];

  reaper_rs [label = "reaper-rs"]
  helgoboss_learn [label = "helgoboss-learn"]
  helgoboss_midi [label = "helgoboss-midi"]

  subgraph cluster_realearn {
    label = "ReaLearn";
    main;
    swell_ui [label = "swell-ui"];
    api;
  }

  main -> api;
  main -> swell_ui;
  main -> reaper_rs;
  main -> helgoboss_learn;
  main -> helgoboss_midi;
  reaper_rs -> helgoboss_midi;
  helgoboss_learn -> helgoboss_midi;
}