private function _listify($lookup)
    {
        $list = array();
        foreach ($lookup as $name => $b) {
            $list[] = $name;
        }
        return implode(', ', $list);
    }
private function _listify($lookup)
    {
        $list = array();
        foreach ($lookup as $name => $b) {
            $list[] = $name;
        }
        return implode(', ', $list);
    }
private function _listify ( $ lookup ) { $ list = array ( ) ; foreach ( $ lookup as $ name => $ b ) { $ list [ ] = $ name ; } return implode ( ', ' , $ list ) ; }
Convenience function for error reporting

@param array $lookup

@return string
Convenience function for error reporting