Hal\Component\BusinessRule\Evaluator::hydrates PHP Method

    private function hydrates(ExpressionLanguage $language)
    {
        $language->register('count', function ($value) {
            return sprintf('(is_array(%1$s) ? sizeof(%1$s) : 0)', $value);
        }, function ($arguments, $value) {
            if (!is_array($value)) {
                return 0;
            }
            return sizeof($value);
        });
        $language->register('isMagicMethod', function ($value) {
            return sprintf('(strpos(%1$s, "__") === 0 ', $value);
        }, function ($arguments, $value) {
            if (!$value instanceof ReflectedMethod) {
                return false;
            }
            return strpos($value->getName(), "__") === 0;
        });
    }