public Map<String, NamespaceIsolationDataImpl> getPolicies() {
        return this.policies;
    }
@Test
    public void testDefaultConstructor() throws Exception {
        NamespaceIsolationPolicies policies = new NamespaceIsolationPolicies();
        assertTrue(policies.getPolicies().isEmpty());

        byte[] outJson = ObjectMapperFactory.create().writeValueAsBytes(policies.getPolicies());
        assertEquals(new String(outJson), "{}");
    }