src/FINDOLOGIC/Export/Data/Item.php
public function addBonus(float $bonus, string $usergroup = ''): void
    {
        $this->bonus->setValue($bonus, $usergroup);
    }
public function addBonus(float $bonus, string $usergroup = ''): void
    {
        $this->bonus->setValue($bonus, $usergroup);
    }
Shortcut to easily add the bonus of the item. The value must be a numeric.

@param float $bonus The bonus value of the item.
@param string $usergroup The usergroup of the bonus value.