start <<= importStmt & P(";") & P("EOF");
    importStmt <<= t_public & +(t_comma & t_public) >>= (ParseTree tree) {
        stderr.writeln("~~~~~~~~~~~~~~~~~~~~");
        stderr.writeln(indent(tree.toString()) ~ " -> ");
        auto res = new ParseTree([tree.children[0]]);
        foreach(child; tree.children[1].children)
            res.children = res.children ~ child.children[1];
        stderr.writeln(indent(res.toString()));
        stderr.writeln("~~~~~~~~~~~~~~~~~~~~");
        return res;
    };