} catch (NoSuchMethodException ex) {
            throw new AssertionError("Should have found method $name(${Arrays.toString(argTypes)}) on class $c")
        }
    }

    protected static void noSuchField(Class c, String name, Class type) {
        try {
            def f = c.getDeclaredField(name)
            if (f.type != type) {
                throw new AssertionError("Field $name was found on class $c but " +