msc {
    hscale="2.0";
    u [label="User"],
    m [label="Mesh config"],
    s [label="State owner"],
    l [label="Change listener"],
    b [label="Backend"];

    u => m [label="mesh_config_entry_get(ID)"];
    m => s [label="getter_callback(ID)"];
    m <- s [label="value=5"],
    u <- m [label="value=5"];
}