Method __construct

public function __construct()
{
    $app = Factory::getApplication();
    $paramsC = PhocacartUtils::getComponentParameters();
    // Affect only calculation in POS cart
    // Not receipts, invoices
    // Display or hide brutto prices in POS cart
    $this->posbruttocalculation = PhocacartPos::isPos() ? $paramsC->get('pos_brutto_calculation', 1) : 0;
}