public static Set<String> getNBServiceList() {
        Set<String> permString = new HashSet<>();
        for (Permission perm : getAdminDefaultPerms()) {
            permString.add(perm.getName());
        }
        return permString;
    }
@Test
    public void testGetNBServiceList() {
        Set<String> permString = new HashSet<>();
        permString.add(new ServicePermission(ApplicationAdminService.class.getName(), ServicePermission.GET).getName());
        assertEquals(1, permString.size());
        assertEquals("org.onosproject.app.ApplicationAdminService", permString.toArray()[0]);
    }