protected function loadFromCache($id, $alphabet)
    {
        if (isset($this->mappingCache[$id]) && isset($this->mappingCache[$id][$alphabet])) {
            return $this->mappingCache[$id][$alphabet];
        }

        return null;
    }
protected function loadFromCache($id, $alphabet)
    {
        if (isset($this->mappingCache[$id]) && isset($this->mappingCache[$id][$alphabet])) {
            return $this->mappingCache[$id][$alphabet];
        }

        return null;
    }
protected function loadFromCache ( $ id , $ alphabet ) { if ( isset ( $ this -> mappingCache [ $ id ] ) && isset ( $ this -> mappingCache [ $ id ] [ $ alphabet ] ) ) { return $ this -> mappingCache [ $ id ] [ $ alphabet ] ; } return null ; }
Load map from cache.

@param  string     $id       cache ID
@param  string     $alphabet
@return array|null char map, null if not found
Load map from cache .