public static function create($start, $end)
    {
        $tmp        = new static();
        $tmp->start = $start;
        $tmp->end   = $end;

        return $tmp;
    }
public static function create($start, $end)
    {
        $tmp        = new static();
        $tmp->start = $start;
        $tmp->end   = $end;

        return $tmp;
    }
@param int $start
@param int $end

@return static