6 node [ shape = record, width = 0, height = 0 ];
7 edge [ color = gray40 ];
12 label = "root\nset|<r0> r0\n*|<r1> r1",
18 node [ style = filled, fillcolor = gray25, fontcolor = white ];
22 root:r0 -> h1 [ color = gray10 ];
23 h1 -> h2 [ style = bold, color = black ];