What will this method return?

public _____ method()
{
    // maps names to whether or not they have been validated
    Map<String, boolean> validated = new HashMap<String, boolean>();

    validated.put("Dillon", false);
    validated.put("Roger", true);

    return validated.keySet();
}

• A set of booleans contaning {false, true}
• The full map of both string (key) and boolean (value) pairs
• We can't know what will be returned without a method signature