public function get(string $entryIdentifier)
    {
        if (!$this->isValidEntryIdentifier($entryIdentifier)) {
            throw new \InvalidArgumentException('"' . $entryIdentifier . '" is not a valid cache entry identifier.', 1233057752);
        }
        $code = $this->backend->get($entryIdentifier);

        if ($code === false) {
            return false;
        }

        preg_match('/^(?:.*\n){1}((?:.*\n)*)(?:.+\n?|\n)$/', $code, $matches);

        return $matches[1];
    }