public static boolean isSyntacticallyCorrectCustomerId(final String customerId) {
    return isAnonymousUser(customerId) || isConfluentCustomer(customerId);
  }
@Test
  public void testCustomerIdInvalidSettings() {
    String[] invalidValues = Stream.concat(
        CustomerIdExamples.INVALID_ANONYMOUS_IDS.stream(),
        CustomerIdExamples.INVALID_CUSTOMER_IDS.stream()).
        toArray(String[]::new);
    for (String invalidValue : invalidValues) {
      assertFalse(invalidValue + " is a valid value for " +
              BaseSupportConfig.CONFLUENT_SUPPORT_CUSTOMER_ID_CONFIG,
          BaseSupportConfig.isSyntacticallyCorrectCustomerId(invalidValue));
    }
  }