| public get_shipping_tax_amount ( string $tax_rate_id ) : float | ||
| $tax_rate_id | string | |
| 리턴 | float | amount |
public function get_shipping_tax_amount($tax_rate_id)
{
return isset($this->shipping_taxes[$tax_rate_id]) ? $this->shipping_taxes[$tax_rate_id] : 0;
}