public function addSalesFrequency(int $salesFrequency, string $usergroup = ''): void
    {
        $this->salesFrequency->setValue($salesFrequency, $usergroup);
    }
public function addSalesFrequency(int $salesFrequency, string $usergroup = ''): void
    {
        $this->salesFrequency->setValue($salesFrequency, $usergroup);
    }
public function addSalesFrequency ( int $ salesFrequency , string $ usergroup = '' ) : void { $ this -> salesFrequency -> setValue ( $ salesFrequency , $ usergroup ) ; }
Shortcut to easily add the sales frequency of the item. The value must be a positive integer.

@param int $salesFrequency The sales frequency of the item.
@param string $usergroup The usergroup of the sales frequency.
Shortcut to easily add the sales frequency of the item . The value must be a positive integer .