docs: function postBackApi (processor, acl) {
      return {
          async postBack (args, ctx) {
              if (!apiAuthorizer(args, ctx, acl)) {
                  return null;
              }
  
              const event = RequestsFactories.postBack(args.senderId, args.action, args.data);
  
              return processor.processMessage(event, args.senderId, args.pageId);
          }
      };
  }