NoCandidateFoundException

11final class NoCandidateFoundException extends \Exception implements Exception12{13    /**14     * @param string $strategy15     */16    public function __construct($strategy, array $candidates)17    {18        $classes = array_map(function ($a) {19            return $a['class'];20        }, $candidates);21        $message = sprintf('No valid candidate found using strategy "%s". We tested the following candidates: %s.', $strategy, implode(', ', array_map([$this, 'stringify'], $classes)));22        parent::__construct($message);23    }24    private function stringify($mixed)25    {26        if (is_string($mixed)) {27            return $mixed;28        }29        if (is_array($mixed) && 2 === count($mixed)) {30            return sprintf('%s::%s', $this->stringify($mixed[0]), $mixed[1]);31        }32        return is_object($mixed) ? get_class($mixed) : gettype($mixed);33    }34}