code: public void marshall(PullRequest pullRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (pullRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(pullRequest.getPullRequestId(), PULLREQUESTID_BINDING);
              protocolMarshaller.marshall(pullRequest.getTitle(), TITLE_BINDING);
              protocolMarshaller.marshall(pullRequest.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(pullRequest.getLastActivityDate(), LASTACTIVITYDATE_BINDING);
              protocolMarshaller.marshall(pullRequest.getCreationDate(), CREATIONDATE_BINDING);
              protocolMarshaller.marshall(pullRequest.getPullRequestStatus(), PULLREQUESTSTATUS_BINDING);
              protocolMarshaller.marshall(pullRequest.getAuthorArn(), AUTHORARN_BINDING);
              protocolMarshaller.marshall(pullRequest.getPullRequestTargets(), PULLREQUESTTARGETS_BINDING);
              protocolMarshaller.marshall(pullRequest.getClientRequestToken(), CLIENTREQUESTTOKEN_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.