public static function getRangeMap($key=NULL)
    {
        if ($key) {
            return isset(self::$_keyRangeMap[$key]) ? self::$_keyRangeMap[$key] : NULL;
        } else {
            return self::$_keyRangeMap;
        }
    }
public static function getRangeMap($key=NULL)
    {
        if ($key) {
            return isset(self::$_keyRangeMap[$key]) ? self::$_keyRangeMap[$key] : NULL;
        } else {
            return self::$_keyRangeMap;
        }
    }
public static function getRangeMap ( $ key = NULL ) { if ( $ key ) { return isset ( self :: $ _keyRangeMap [ $ key ] ) ? self :: $ _keyRangeMap [ $ key ] : NULL ; } else { return self :: $ _keyRangeMap ; } }
Get Range Map by key or all from the actived sheet

@param string|int $key Key set by addRow()
@return string|array Range string | Key-Range array
Get Range Map by key or all from the actived sheet