dot.writeln("    concentrate=\"true\"");
    private void writeDotHeader(String name, LineWriter dot) throws IOException {        dot.writeln("digraph " + name + " {");        dot.writeln("  graph [");        dot.writeln("    rankdir=\"RL\"");        dot.writeln("    bgcolor=\"" + StyleSheet.getBodyBackground() + "\"");        dot.writeln("    concentrate=\"true\"");        dot.writeln("  ];");        dot.writeln("  node [");        dot.writeln("    fontsize=\"11\"");        dot.writeln("    shape=\"plaintext\"");        dot.writeln("  ];");    }