Update: Remvoe hardcoding Class Name

examples/b2c/checkout/integrations/classes/B2CDeliverySample.cls

@@ -7,7 +7,7 @@ global class B2CDeliverySample implements sfdc_checkout.CartShippingCharges {
     private static String httpHost = 'https://example.com';
     private static Boolean useHTTPService = false;
     private static String className = String.valueOf(this).split(':')[0];
-    ApexClass apexClass = [SELECT ApiVersion FROM ApexClass WHERE Name = 'B2CDeliverySample'];
+    ApexClass apexClass = [SELECT ApiVersion FROM ApexClass WHERE Name = :className];
     global sfdc_checkout.IntegrationStatus startCartProcessAsync(sfdc_checkout.IntegrationInfo jobInfo, Id cartId) {
         sfdc_checkout.IntegrationStatus integStatus = new sfdc_checkout.IntegrationStatus();
         try {