docs: public void marshall(CommentMetadata commentMetadata, ProtocolMarshaller protocolMarshaller) {
  
          if (commentMetadata == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(commentMetadata.getCommentId(), COMMENTID_BINDING);
              protocolMarshaller.marshall(commentMetadata.getContributor(), CONTRIBUTOR_BINDING);
              protocolMarshaller.marshall(commentMetadata.getCreatedTimestamp(), CREATEDTIMESTAMP_BINDING);
              protocolMarshaller.marshall(commentMetadata.getCommentStatus(), COMMENTSTATUS_BINDING);
              protocolMarshaller.marshall(commentMetadata.getRecipientId(), RECIPIENTID_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }