public static function fromLowHigh(int $low, int $high): self
    {
        $bigint = new Bigint();
        $bigint->fillBytes($low, 0, 4);
        $bigint->fillBytes($high, 4, 4);
        return $bigint;
    }
public static function fromLowHigh(int $low, int $high): self
    {
        $bigint = new Bigint();
        $bigint->fillBytes($low, 0, 4);
        $bigint->fillBytes($high, 4, 4);
        return $bigint;
    }
public static function fromLowHigh ( int $ low , int $ high ) : self { $ bigint = new Bigint ( ) ; $ bigint -> fillBytes ( $ low , 0 , 4 ) ; $ bigint -> fillBytes ( $ high , 4 , 4 ) ; return $ bigint ; }
Fill bytes from low to high

@param int $low
@param int $high
@return Bigint
Fill bytes from low to high