class InvalidConfigException

final class InvalidConfigException extends \RuntimeException {
    
    /**
     * Constructs an InvalidConfigException object.
     *
     * @param \Symfony\Component\Validator\ConstraintViolationList $violations
     *   The validation constraint violations.
     * @param \Drupal\Core\Config\Schema\Mapping $data
     *   A typed data wrapper around the invalid config data.
     * @param string $message
     *   (optional) The exception message. Defaults to the string representation
     *   of the constraint violation list.
     * @param int $code
     *   (optional) The exception code. Defaults to 0.
     * @param \Throwable|null $previous
     *   (optional) The previous exception, if any.
     */
    public function __construct(ConstraintViolationList $violations, Mapping $data, string $message = '', int $code = 0, ?\Throwable $previous = NULL) {
        parent::__construct($message ?: $this->formatMessage(), $code, $previous);
    }
    
    /**
     * Formats the constraint violation list as a human-readable message.
     *
     * @return string
     *   The formatted message.
     */
    private function formatMessage() : string {
        $lines = [
            sprintf('There were validation errors in %s:', $this->data
                ->getName()),
        ];
        
        /** @var \Symfony\Component\Validator\ConstraintViolationInterface $violation */
        foreach ($this->violations as $violation) {
            $lines[] = sprintf('- %s: %s', $violation->getPropertyPath(), $violation->getMessage());
        }
        return implode("\n", $lines);
    }

}