no message

Method.php

@@ -19,10 +19,11 @@ function vatIsInteger() {return false;}
 
 	/**
 	 * 2017-03-07
+	 * https://mage2.pro/t/3355/2
 	 * @override
 	 * @see \Df\GingerPaymentsBase\Method::bankTransferId()
 	 * @used-by \Df\GingerPaymentsBase\Method::optionT()
 	 * @return bool
 	 */
-	protected function bankTransferId() {return GM::BANK_TRANSFER_G;}
+	protected function bankTransferId() {return 'sepa-debit-transfer';}
 }

Source/Option.php

@@ -1,20 +1,16 @@
 <?php
 namespace Dfe\GingerPayments\Source;
-use GingerPayments\Payment\Order\Transaction\PaymentMethod as M;
 // 2017-03-01
 // [Ginger Payments] Available payment options: https://mage2.pro/t/3463
 /** @method static Option s() */
 final class Option extends \Df\GingerPaymentsBase\Source\Option {
 	/**
 	 * 2017-03-01
+	 * What is SOFORT and how does it work? https://mage2.pro/t/3425
 	 * @override
 	 * @see \Df\GingerPaymentsBase\Source\Option::mapExtra()
 	 * @used-by \Df\GingerPaymentsBase\Source\Option::map()
 	 * @return array(string => string)
 	 */
-	protected function mapExtra() {return [
-		// 2017-03-01
-		// What is SOFORT and how does it work? https://mage2.pro/t/3425
-		M::SOFORT => 'SOFORT'
-	];}
+	protected function mapExtra() {return ['sofort' => 'SOFORT'];}
 }

T/CreateOrder/BankTransfer.php

@@ -10,5 +10,5 @@ final class BankTransfer extends \Df\GingerPaymentsBase\T\CreateOrder {
 	 * @used-by \Df\GingerPaymentsBase\T\CreateOrder::t01_success()
 	 * @return string
 	 */
-	protected function method() {return M::BANK_TRANSFER_G;}
+	protected function method() {return 'sepa-debit-transfer';}
 }