Doctrine\OrientDB\Query\Command\Update::set PHP Method

You can $append the values.

public set ( array $values, boolean $append = true ) : Update
$values	array
$append	boolean
return	Update

    public function set(array $values, $append = true)
    {
        $this->setTokenValues('Updates', $values, $append);
        return $this;
    }

Update