docs: public void marshall(Attachment attachment, ProtocolMarshaller protocolMarshaller) {
  
          if (attachment == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(attachment.getFileName(), FILENAME_BINDING);
              protocolMarshaller.marshall(attachment.getData(), DATA_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }