$component is undefined on line 52 of Search/Scorer.php

    public function process()
    {
        foreach ($this->_resultSet as $mainRow) {
            if (isset($mainRow[$component])) {  <<<---- undefined.
                if ( ! is_array($mainRow[$component])) {
                    throw new Doctrine_Search_Exception('Wrong data type in result set.');
                }
                
                foreach ($mainRow[$component] as $indexRow) {

                }
            }
        }
    }