code: public ListOrdersRequest withFulfillmentChannel(String... values) {
          List<String> list = getFulfillmentChannel();
          for (String value : values) {
              list.add(value);
          }
          return this;
      }
docs: Add values for FulfillmentChannel, return this.
  
  @param fulfillmentChannel
  New values to add.
  
  @return This instance.