@Override
  public void checkTopicAccess(
      final KsqlSecurityContext securityContext,
      final String topicName,
      final AclOperation operation
  ) {
    checkAccess(new CacheKey(securityContext,
        AuthObjectType.TOPIC,
        topicName,
        operation));

  }
@Test
  public void shouldCheckBackendValidatorOnFirstTopicAccessRequest() {
    // When
    cache.checkTopicAccess(securityContext, TOPIC_1, AclOperation.READ);

    // Then
    verify(backendValidator, times(1))
        .checkTopicAccess(securityContext, TOPIC_1, AclOperation.READ);
    verifyNoMoreInteractions(backendValidator);
  }