withoutAttributeSanitizer example

            public function sanitizeAttribute(string $element, string $attribute, string $value, HtmlSanitizerConfig $config): ?string
            {
                return '';
            }
        };

        $config = $config->withAttributeSanitizer($sanitizer);
        $this->assertContains($sanitizer, $config->getAttributeSanitizers());

        $config = $config->withoutAttributeSanitizer($sanitizer);
        $this->assertNotContains($sanitizer, $config->getAttributeSanitizers());
    }
}