public void setSubscriptionDurability(String subscriptionDurability) {
        this.subscriptionDurability = subscriptionDurability;
    }
@Test(timeout = 60000)
    public void testInvalidSubscriptionDurability() {
        activationSpec.setSubscriptionDurability("foobar");
        PropertyDescriptor[] expected = {subscriptionDurabilityProperty};
        assertActivationSpecInvalid(expected);
    }