vendor/symfony/config/Definition/EnumNode.php line 25
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Config\Definition;use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;/*** Node which only allows a finite set of values.** @author Johannes M. Schmitt <schmittjoh@gmail.com>*/class EnumNode extends ScalarNode{private array $values;public function __construct(?string $name, NodeInterface $parent = null, array $values = [], string $pathSeparator = BaseNode::DEFAULT_PATH_SEPARATOR){$values = array_unique($values);if (!$values) {throw new \InvalidArgumentException('$values must contain at least one element.');}parent::__construct($name, $parent, $pathSeparator);$this->values = $values;}public function getValues(){return $this->values;}protected function finalizeValue(mixed $value): mixed{$value = parent::finalizeValue($value);if (!\in_array($value, $this->values, true)) {$ex = new InvalidConfigurationException(sprintf('The value %s is not allowed for path "%s". Permissible values: %s', json_encode($value), $this->getPath(), implode(', ', array_map('json_encode', $this->values))));$ex->setPath($this->getPath());throw $ex;}return $value;}}