roundcubemail/program/lib/Roundcube/rcube_plugin.php
private function label_map_callback($key)
    {
        if (strpos($key, $this->ID.'.') === 0) {
            return $key;
        }

        return $this->ID.'.'.$key;
    }
private function label_map_callback($key)
    {
        if (strpos($key, $this->ID.'.') === 0) {
            return $key;
        }

        return $this->ID.'.'.$key;
    }
private function label_map_callback ( $ key ) { if ( strpos ( $ key , $ this -> ID . '.' ) === 0 ) { return $ key ; } return $ this -> ID . '.' . $ key ; }
Callback function for array_map

@param string $key Array key.
@return string
Callback function for array_map