public static void testProjectionUsingThis() {
    Set records = new HashSet();
    for (int i = 0; i < 53; i++) {
      Bean2 record = new Bean2(i);
      records.add(record);
    }

    Object result = MVEL.eval("(_prop in this)",
        records);
    System.out.println("result: " + result);
  }