// returns an object with a "strategy" method
static O loadStrategy(S id) {
  int type = getSnippetType(id);
  if (type == 34) {
    // JavaX Strategy
    final O strategy = run(id);
    ret strategy;
  } else {
    // Lua Strategy
    S lua = loadSnippet(id);
    Sandbox s = luaSandbox();
    evalLua(s, lua);
    final LuaValue strategy = s.get("strategy");
    assertNotNil(strategy);
    ret new O {
      S strategy(S text) {
        ret callLuaStrategy(strategy, text);
      }
    };
  }
}