private function getCacheKey(Request $request)
    {
        if (isset($this->keyCache[$request])) {
            return $this->keyCache[$request];
        }

        return $this->keyCache[$request] = $this->generateCacheKey($request);
    }
private function getCacheKey(Request $request)
    {
        if (isset($this->keyCache[$request])) {
            return $this->keyCache[$request];
        }

        return $this->keyCache[$request] = $this->generateCacheKey($request);
    }
private function getCacheKey ( Request $ request ) { if ( isset ( $ this -> keyCache [ $ request ] ) ) { return $ this -> keyCache [ $ request ] ; } return $ this -> keyCache [ $ request ] = $ this -> generateCacheKey ( $ request ) ; }
Returns a cache key for the given Request.

@return string A key for the given Request
Returns a cache key for the given Request .