if (structs.length == 0) return;  new StructureIncludeFile(structs, toplevel, dir);
doit(structs, toplevel, ".");
    public static void doit(SIRStructure[] structs, FlatNode toplevel, String dir)     {        if (structs.length == 0)             return;            new StructureIncludeFile(structs, toplevel, dir);    }