/**
* Update the quantity of the subscription.
*
* @param \Stripe\Customer $customer
* @param int $quantity
* @return void
*/
public function updateQuantity($customer, $quantity)
{
$subscription = ['plan' => $customer->subscription->plan->id, 'quantity' => $quantity];
if ($trialEnd = $this->getTrialEndForUpdate()) {
$subscription['trial_end'] = $trialEnd;
}
$customer->updateSubscription($subscription);
}