protected function getFromLookup(/*# string */ $key)
    {
        // found already ? or try find
        if ($key === $this->cache_key || $this->hasInLookup($key)) {
            return $this->getFromRegistry($this->cache_reg, $key);
        }
        // not found
        return null;
    }
protected function getFromLookup(/*# string */ $key)
    {
        // found already ? or try find
        if ($key === $this->cache_key || $this->hasInLookup($key)) {
            return $this->getFromRegistry($this->cache_reg, $key);
        }
        // not found
        return null;
    }
protected function getFromLookup ( /*# string */ $ key ) { // found already ? or try find if ( $ key === $ this -> cache_key || $ this -> hasInLookup ( $ key ) ) { return $ this -> getFromRegistry ( $ this -> cache_reg , $ key ) ; } // not found return null ; }
get from lookup pool, return NULL if not found

@param  string $key
@return mixed|null
@access protected
get from lookup pool return NULL if not found