protected function getCacheKeyFromKey($key)
    {
        $cacheKeyFn = $this->options->getCacheKeyFn();
        $cacheKey = $cacheKeyFn ? $cacheKeyFn($key) : $key;

        return $cacheKey;
    }
protected function getCacheKeyFromKey($key)
    {
        $cacheKeyFn = $this->options->getCacheKeyFn();
        $cacheKey = $cacheKeyFn ? $cacheKeyFn($key) : $key;

        return $cacheKey;
    }
protected function getCacheKeyFromKey ( $ key ) { $ cacheKeyFn = $ this -> options -> getCacheKeyFn ( ) ; $ cacheKey = $ cacheKeyFn ? $ cacheKeyFn ( $ key ) : $ key ; return $ cacheKey ; }
@param $key

@return mixed
@param $key