src/Payum/Paypal/ExpressCheckout/Nvp/Action/RecurringPaymentDetailsSyncAction.php
public function supports($request)
    {
        if (false == $request instanceof Sync) {
            return false;
        }

        $model = $request->getModel();
        if (false == $model instanceof \ArrayAccess) {
            return false;
        }

        return isset($model['BILLINGPERIOD']) && null !== $model['BILLINGPERIOD'];
    }
public function supports($request)
    {
        if (false == $request instanceof Sync) {
            return false;
        }

        $model = $request->getModel();
        if (false == $model instanceof \ArrayAccess) {
            return false;
        }

        return isset($model['BILLINGPERIOD']) && null !== $model['BILLINGPERIOD'];
    }
{@inheritDoc}