protected function resolveReference($from)
    {

        // query whether or not a reference exists
        if (isset($this->references[$from])) {
            return $this->references[$from];
        }

        // return the passed reference
        return $from;
    }
protected function resolveReference($from)
    {

        // query whether or not a reference exists
        if (isset($this->references[$from])) {
            return $this->references[$from];
        }

        // return the passed reference
        return $from;
    }
protected function resolveReference ( $ from ) { // query whether or not a reference exists if ( isset ( $ this -> references [ $ from ] ) ) { return $ this -> references [ $ from ] ; } // return the passed reference return $ from ; }
Resolve's the cache key.

@param string $from The cache key to resolve

@return string The resolved reference
Resolve s the cache key .