public AppNamespace findByAppIdAndName(String appId, String namespaceName) {
    return appNamespaceRepository.findByAppIdAndName(appId, namespaceName);
  }
@Test
  @Sql(scripts = "/sql/appnamespaceservice/init-appnamespace.sql", executionPhase = Sql.ExecutionPhase.BEFORE_TEST_METHOD)
  @Sql(scripts = "/sql/cleanup.sql", executionPhase = Sql.ExecutionPhase.AFTER_TEST_METHOD)
  public void testFindPublicAppNamespaceByAppAndName() {

    Assert.assertNotNull(appNamespaceService.findByAppIdAndName("100003173", "datasourcexml"));

    Assert.assertNull(appNamespaceService.findByAppIdAndName("100003173", "TFF.song0711-02"));
  }