defdesign kuku {
  defstyle aaa [style=bold]
  graph [bgcolor=red];
}

digraph structs {
    usedesign kuku;
    rankdir=LR
    subgraph cluster_aa {
        subgraph cluster_in {
            a[shadow_offset=5, shadow_blur=2][aaa]; 
            a, x->y;
        }
        a->b a->b::\c(red)aaa\c(blue)bbbb\c()aaaa;
        f[style="bold,dashed,filled,rounded",shape=box];
    }
    node [shape=record];
    struct1 [label="<f0> left|<f1> mid&#92; dle|<f2> right"];
    struct2 [label="<f0> one|<f1> two"];
    struct3 [label="hello&#92;nworld |{ b |{c|<here> d|e}| f}| g | h"];
    struct1:f1 -> struct2:f0;
    struct1:f2 -> struct3:here;
}

graph{aa--bb}