import std.stdio;

​

import std.traits : hasUDA;

enum hover;

​

struct Style {

  struct Root {

    auto margin = "10px";

    auto backgroundColor = "white";

    @hover struct Hover {

      auto backgroundColor = "gray";

    }

  }

}

pragma(msg, hasUDA!(Style.Root.Hover, hover));

​

void main()

{

}