Predis\Command\KeyMigrate::filterArguments PHP Метод

    protected function filterArguments(array $arguments)
    {
        if (is_array(end($arguments))) {
            foreach (array_pop($arguments) as $modifier => $value) {
                $modifier = strtoupper($modifier);
                if ($modifier === 'COPY' && $value == true) {
                    $arguments[] = $modifier;
                }
                if ($modifier === 'REPLACE' && $value == true) {
                    $arguments[] = $modifier;
                }
            }
        }
        return $arguments;
    }