ValueObjects\Structure\Dictionary::__construct PHP Method

    public function __construct(\SplFixedArray $key_value_pairs)
    {
        foreach ($key_value_pairs as $keyValuePair) {
            if (false === $keyValuePair instanceof KeyValuePair) {
                $type = \is_object($keyValuePair) ? \get_class($keyValuePair) : \gettype($keyValuePair);
                throw new \InvalidArgumentException(\sprintf('Passed SplFixedArray object must contains "KeyValuePair" objects only. "%s" given.', $type));
            }
        }
        $this->items = $key_value_pairs;
    }